{"site":"https://digitalgemology.com","build":"20261003-153830","version":"1.0.0","price_eur":"9.99","licence":{"default":"personal use","commercial":"by email to support@digitalgemology.com","terms":"https://digitalgemology.com/terms","refunds":"14-day withdrawal for consumers, even after download"},"links":{"docs":"https://digitalgemology.com/about/agents","mcp":"https://digitalgemology.com/mcp","openapi":"https://digitalgemology.com/api/openapi.json","llms_txt":"https://digitalgemology.com/llms.txt"},"gemstones":[{"slug":"diamond","name":"Diamond","url":"https://digitalgemology.com/gemstones/diamond","summary":"Refractive index 2.417 · critical angle 24.4° · 36 cuts scored","constants":{"Refractive index":"2.417","Birefringence":"None (isotropic)","Dispersion":"0.044","Hardness (Mohs)":"10","Specific gravity":"3.52","Crystal system":"Cubic","Critical angle":"24.4°","Guide minimum pavilion angle":"38.9° for a round 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critical angle 34.6° · 36 cuts scored","constants":{"Refractive index":"1.762 to 1.770","Birefringence":"0.008","Dispersion":"0.018","Hardness (Mohs)":"9","Specific gravity":"4.00","Crystal system":"Trigonal","Critical angle":"34.6°","Guide minimum pavilion angle":"36.4° for a round design"},"critical_angle_deg":34.6,"top_ten":{"brilliants":[{"rank":1,"cut":"dg-vitruvio","name":"DG-Vitruvio","kind":"Brilliant","brilliance":94,"fire":37,"scintillation":98,"page":"https://digitalgemology.com/gemstones/ruby/dg-vitruvio"},{"rank":2,"cut":"dg-m5","name":"DG-M5","kind":"House cut","brilliance":100,"fire":39,"scintillation":85,"page":"https://digitalgemology.com/gemstones/ruby/dg-m5"},{"rank":3,"cut":"dg-miliano","name":"DG-Miliano","kind":"House 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design"},"critical_angle_deg":34.6,"top_ten":{"brilliants":[{"rank":1,"cut":"dg-vitruvio","name":"DG-Vitruvio","kind":"Brilliant","brilliance":94,"fire":37,"scintillation":98,"page":"https://digitalgemology.com/gemstones/sapphire/dg-vitruvio"},{"rank":2,"cut":"dg-m5","name":"DG-M5","kind":"House cut","brilliance":100,"fire":39,"scintillation":85,"page":"https://digitalgemology.com/gemstones/sapphire/dg-m5"},{"rank":3,"cut":"dg-miliano","name":"DG-Miliano","kind":"House cut","brilliance":90,"fire":35,"scintillation":98,"page":"https://digitalgemology.com/gemstones/sapphire/dg-miliano"},{"rank":4,"cut":"dg-anteros","name":"DG-Anteros","kind":"Brilliant","brilliance":97,"fire":43,"scintillation":80,"page":"https://digitalgemology.com/gemstones/sapphire/dg-anteros"},{"rank":5,"cut":"t105-round-brilliant","name":"T105 Round 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Single","kind":"Historic cut","brilliance":36,"fire":9,"scintillation":44,"page":"https://digitalgemology.com/gemstones/sapphire/old-single"}],"jewelry":[{"rank":1,"cut":"oval","name":"Oval","kind":"Jewelry cut","brilliance":66,"fire":74,"scintillation":87,"page":"https://digitalgemology.com/gemstones/sapphire/oval"},{"rank":2,"cut":"trilliant","name":"Trilliant","kind":"Jewelry cut","brilliance":86,"fire":52,"scintillation":79,"page":"https://digitalgemology.com/gemstones/sapphire/trilliant"},{"rank":3,"cut":"trillion","name":"Trillion","kind":"Jewelry cut","brilliance":72,"fire":59,"scintillation":80,"page":"https://digitalgemology.com/gemstones/sapphire/trillion"},{"rank":4,"cut":"cushion","name":"Cushion","kind":"Jewelry cut","brilliance":88,"fire":36,"scintillation":85,"page":"https://digitalgemology.com/gemstones/sapphire/cushion"},{"rank":5,"cut":"teardrop","name":"Teardrop","kind":"Jewelry cut","brilliance":59,"fire":64,"scintillation":81,"page":"https://digitalgemology.com/gemstones/sapphire/teardrop"},{"rank":6,"cut":"square","name":"Square","kind":"Jewelry cut","brilliance":78,"fire":45,"scintillation":78,"page":"https://digitalgemology.com/gemstones/sapphire/square"},{"rank":7,"cut":"princess","name":"Princess","kind":"Jewelry cut","brilliance":68,"fire":52,"scintillation":78,"page":"https://digitalgemology.com/gemstones/sapphire/princess"},{"rank":8,"cut":"emerald-square","name":"Emerald Square","kind":"Jewelry cut","brilliance":71,"fire":53,"scintillation":72,"page":"https://digitalgemology.com/gemstones/sapphire/emerald-square"},{"rank":9,"cut":"marquise","name":"Marquise","kind":"Jewelry cut","brilliance":55,"fire":54,"scintillation":86,"page":"https://digitalgemology.com/gemstones/sapphire/marquise"},{"rank":10,"cut":"pear","name":"Pear","kind":"Jewelry cut","brilliance":62,"fire":56,"scintillation":76,"page":"https://digitalgemology.com/gemstones/sapphire/pear"}]}},{"slug":"emerald","name":"Emerald","url":"https://digitalgemology.com/gemstones/emerald","summary":"Refractive index 1.577 to 1.583 · critical angle 39.4° · 36 cuts scored","constants":{"Refractive index":"1.577 to 1.583","Birefringence":"0.006","Dispersion":"0.014","Hardness (Mohs)":"7.5 to 8","Specific gravity":"2.72","Crystal system":"Hexagonal","Critical angle":"39.4°","Guide minimum pavilion angle":"39.4° for a round design"},"critical_angle_deg":39.4,"top_ten":{"brilliants":[{"rank":1,"cut":"dg-m5","name":"DG-M5","kind":"House cut","brilliance":90,"fire":46,"scintillation":85,"page":"https://digitalgemology.com/gemstones/emerald/dg-m5"},{"rank":2,"cut":"dg-anteros","name":"DG-Anteros","kind":"Brilliant","brilliance":86,"fire":52,"scintillation":80,"page":"https://digitalgemology.com/gemstones/emerald/dg-anteros"},{"rank":3,"cut":"dg-vitruvio","name":"DG-Vitruvio","kind":"Brilliant","brilliance":78,"fire":40,"scintillation":98,"page":"https://digitalgemology.com/gemstones/emerald/dg-vitruvio"},{"rank":4,"cut":"dg-miliano","name":"DG-Miliano","kind":"House cut","brilliance":67,"fire":34,"scintillation":98,"page":"https://digitalgemology.com/gemstones/emerald/dg-miliano"},{"rank":5,"cut":"t73-round-brilliant","name":"T73 Round Brilliant","kind":"Benchmark","brilliance":null,"fire":null,"scintillation":null,"page":"https://digitalgemology.com/gemstones/emerald/t73-round-brilliant"},{"rank":6,"cut":"t105-round-brilliant","name":"T105 Round Brilliant","kind":"Brilliant","brilliance":71,"fire":34,"scintillation":90,"page":"https://digitalgemology.com/gemstones/emerald/t105-round-brilliant"},{"rank":7,"cut":"t57-round-brilliant","name":"T57 Round Brilliant","kind":"Historic cut","brilliance":78,"fire":40,"scintillation":72,"page":"https://digitalgemology.com/gemstones/emerald/t57-round-brilliant"},{"rank":8,"cut":"old-european","name":"Old European","kind":"Historic cut","brilliance":64,"fire":42,"scintillation":81,"page":"https://digitalgemology.com/gemstones/emerald/old-european"},{"rank":9,"cut":"dg-rafaello","name":"DG-Rafaello","kind":"House cut","brilliance":54,"fire":28,"scintillation":96,"page":"https://digitalgemology.com/gemstones/emerald/dg-rafaello"},{"rank":10,"cut":"old-single","name":"Old Single","kind":"Historic cut","brilliance":17,"fire":32,"scintillation":44,"page":"https://digitalgemology.com/gemstones/emerald/old-single"}],"jewelry":[{"rank":1,"cut":"oval","name":"Oval","kind":"Jewelry cut","brilliance":55,"fire":71,"scintillation":87,"page":"https://digitalgemology.com/gemstones/emerald/oval"},{"rank":2,"cut":"teardrop","name":"Teardrop","kind":"Jewelry cut","brilliance":54,"fire":63,"scintillation":81,"page":"https://digitalgemology.com/gemstones/emerald/teardrop"},{"rank":3,"cut":"trillion","name":"Trillion","kind":"Jewelry cut","brilliance":63,"fire":48,"scintillation":80,"page":"https://digitalgemology.com/gemstones/emerald/trillion"},{"rank":4,"cut":"pear","name":"Pear","kind":"Jewelry cut","brilliance":56,"fire":59,"scintillation":76,"page":"https://digitalgemology.com/gemstones/emerald/pear"},{"rank":5,"cut":"asscher","name":"Asscher","kind":"Jewelry cut","brilliance":62,"fire":55,"scintillation":72,"page":"https://digitalgemology.com/gemstones/emerald/asscher"},{"rank":6,"cut":"trilliant","name":"Trilliant","kind":"Jewelry cut","brilliance":68,"fire":41,"scintillation":79,"page":"https://digitalgemology.com/gemstones/emerald/trilliant"},{"rank":7,"cut":"cushion","name":"Cushion","kind":"Jewelry cut","brilliance":74,"fire":27,"scintillation":85,"page":"https://digitalgemology.com/gemstones/emerald/cushion"},{"rank":8,"cut":"square","name":"Square","kind":"Jewelry cut","brilliance":68,"fire":38,"scintillation":78,"page":"https://digitalgemology.com/gemstones/emerald/square"},{"rank":9,"cut":"emerald-square","name":"Emerald Square","kind":"Jewelry cut","brilliance":66,"fire":46,"scintillation":72,"page":"https://digitalgemology.com/gemstones/emerald/emerald-square"},{"rank":10,"cut":"marquise","name":"Marquise","kind":"Jewelry cut","brilliance":43,"fire":51,"scintillation":86,"page":"https://digitalgemology.com/gemstones/emerald/marquise"}]}},{"slug":"amethyst","name":"Amethyst","url":"https://digitalgemology.com/gemstones/amethyst","summary":"Refractive index 1.544 to 1.553 · critical angle 40.4° · 36 cuts scored","constants":{"Refractive index":"1.544 to 1.553","Birefringence":"0.009","Dispersion":"0.013","Hardness (Mohs)":"7","Specific gravity":"2.65","Crystal system":"Trigonal","Critical angle":"40.4°","Guide minimum pavilion angle":"40.4° for a round design"},"critical_angle_deg":40.4,"top_ten":{"brilliants":[{"rank":1,"cut":"dg-m5","name":"DG-M5","kind":"House cut","brilliance":85,"fire":50,"scintillation":85,"page":"https://digitalgemology.com/gemstones/amethyst/dg-m5"},{"rank":2,"cut":"dg-anteros","name":"DG-Anteros","kind":"Brilliant","brilliance":82,"fire":54,"scintillation":80,"page":"https://digitalgemology.com/gemstones/amethyst/dg-anteros"},{"rank":3,"cut":"dg-vitruvio","name":"DG-Vitruvio","kind":"Brilliant","brilliance":71,"fire":36,"scintillation":98,"page":"https://digitalgemology.com/gemstones/amethyst/dg-vitruvio"},{"rank":4,"cut":"t73-round-brilliant","name":"T73 Round Brilliant","kind":"Benchmark","brilliance":null,"fire":null,"scintillation":null,"page":"https://digitalgemology.com/gemstones/amethyst/t73-round-brilliant"},{"rank":5,"cut":"t105-round-brilliant","name":"T105 Round Brilliant","kind":"Brilliant","brilliance":65,"fire":31,"scintillation":90,"page":"https://digitalgemology.com/gemstones/amethyst/t105-round-brilliant"},{"rank":6,"cut":"dg-miliano","name":"DG-Miliano","kind":"House cut","brilliance":60,"fire":28,"scintillation":98,"page":"https://digitalgemology.com/gemstones/amethyst/dg-miliano"},{"rank":7,"cut":"t57-round-brilliant","name":"T57 Round Brilliant","kind":"Historic cut","brilliance":71,"fire":37,"scintillation":72,"page":"https://digitalgemology.com/gemstones/amethyst/t57-round-brilliant"},{"rank":8,"cut":"old-european","name":"Old European","kind":"Historic cut","brilliance":59,"fire":37,"scintillation":81,"page":"https://digitalgemology.com/gemstones/amethyst/old-european"},{"rank":9,"cut":"dg-rafaello","name":"DG-Rafaello","kind":"House cut","brilliance":45,"fire":26,"scintillation":96,"page":"https://digitalgemology.com/gemstones/amethyst/dg-rafaello"},{"rank":10,"cut":"old-single","name":"Old Single","kind":"Historic cut","brilliance":15,"fire":38,"scintillation":44,"page":"https://digitalgemology.com/gemstones/amethyst/old-single"}],"jewelry":[{"rank":1,"cut":"oval","name":"Oval","kind":"Jewelry cut","brilliance":52,"fire":69,"scintillation":87,"page":"https://digitalgemology.com/gemstones/amethyst/oval"},{"rank":2,"cut":"teardrop","name":"Teardrop","kind":"Jewelry cut","brilliance":49,"fire":60,"scintillation":81,"page":"https://digitalgemology.com/gemstones/amethyst/teardrop"},{"rank":3,"cut":"pear","name":"Pear","kind":"Jewelry cut","brilliance":52,"fire":60,"scintillation":76,"page":"https://digitalgemology.com/gemstones/amethyst/pear"},{"rank":4,"cut":"asscher","name":"Asscher","kind":"Jewelry cut","brilliance":60,"fire":52,"scintillation":72,"page":"https://digitalgemology.com/gemstones/amethyst/asscher"},{"rank":5,"cut":"trillion","name":"Trillion","kind":"Jewelry cut","brilliance":60,"fire":44,"scintillation":80,"page":"https://digitalgemology.com/gemstones/amethyst/trillion"},{"rank":6,"cut":"cushion","name":"Cushion","kind":"Jewelry cut","brilliance":69,"fire":24,"scintillation":85,"page":"https://digitalgemology.com/gemstones/amethyst/cushion"},{"rank":7,"cut":"square","name":"Square","kind":"Jewelry cut","brilliance":65,"fire":34,"scintillation":78,"page":"https://digitalgemology.com/gemstones/amethyst/square"},{"rank":8,"cut":"trilliant","name":"Trilliant","kind":"Jewelry cut","brilliance":63,"fire":34,"scintillation":79,"page":"https://digitalgemology.com/gemstones/amethyst/trilliant"},{"rank":9,"cut":"emerald-square","name":"Emerald Square","kind":"Jewelry cut","brilliance":61,"fire":40,"scintillation":72,"page":"https://digitalgemology.com/gemstones/amethyst/emerald-square"},{"rank":10,"cut":"marquise","name":"Marquise","kind":"Jewelry cut","brilliance":38,"fire":48,"scintillation":86,"page":"https://digitalgemology.com/gemstones/amethyst/marquise"}]}}],"cuts":[{"slug":"t73-round-brilliant","name":"T73 Round Brilliant Cut","url":"https://digitalgemology.com/cuts/t73-round-brilliant","markdown":"https://digitalgemology.com/cuts/t73-round-brilliant.md","category":"Brilliants","category_id":"brilliants","shape":"round","facets":73,"size":"8.15 x 8.15 mm","summary":"The same 1919 round brilliant proportions as the T57, carrying a sixteen-facet girdle band: 57 facets plus 16 girdle facets. This is how most round brilliants are finished today.","description":"T73 Round Brilliant Cut 3D model and GemCad faceting diagram: 73 facets, 8.15 x 8.15 x 5.03 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Brilliants","Facets":"73 planar facets (57 + 16 girdles = 73)","Outline":"Length to width 1.000","Total depth":"61.7% of width","Crown angle (main)":"34.5°","Pavilion angle (main)":"40.8°","Reference size":"8.15 x 8.15 x 5.03 mm at 1.99 ct in diamond","Volume":"113.15 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.009° of the 3D model (average under 0.001°); girdle facets within 0.016°","Index gear":"96","Symmetry":"8-fold mirror-image symmetry","Tiers":"3 crown, 2 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":null,"fire":null,"scintillation":null,"t73":{"brilliance":null,"fire":null,"scintillation":null},"tags":[]},"moissanite":{"brilliance":null,"fire":null,"scintillation":null,"t73":{"brilliance":null,"fire":null,"scintillation":null},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":null,"fire":null,"scintillation":null,"t73":{"brilliance":null,"fire":null,"scintillation":null},"tags":["Best overall","Highest brilliance"]},"ruby":{"brilliance":null,"fire":null,"scintillation":null,"t73":{"brilliance":null,"fire":null,"scintillation":null},"tags":[]},"sapphire":{"brilliance":null,"fire":null,"scintillation":null,"t73":{"brilliance":null,"fire":null,"scintillation":null},"tags":[]},"emerald":{"brilliance":null,"fire":null,"scintillation":null,"t73":{"brilliance":null,"fire":null,"scintillation":null},"tags":[]},"amethyst":{"brilliance":null,"fire":null,"scintillation":null,"t73":{"brilliance":null,"fire":null,"scintillation":null},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.99 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.82 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.28 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.26 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.26 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.54 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.50 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"T73 Round Brilliant Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/ef4dd7c5-5809-4458-9eff-1beb80ed52c0","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"T73 Round Brilliant Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/44ee6a27-8125-4940-b84c-6c368746df74","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the T73 Round Brilliant Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 73 planar facets."},{"question":"Is there a faceting diagram for the T73 Round Brilliant Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (57 + 16 girdles = 73 facets, 96 index, 8-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the T73 Round Brilliant Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the T73 Round Brilliant Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.009° of the 3D model (average under 0.001°); girdle facets within 0.016°. The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the T73 Round Brilliant Cut model, and what does it weigh?","answer":"The model measures 8.15 x 8.15 x 5.03 mm, which is 1.99 ct in diamond. The same size weighs 1.82 ct in moissanite, 3.28 ct in cubic zirconia, 2.26 ct in ruby, 2.26 ct in sapphire, 1.54 ct in emerald, 1.50 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the T73 Round Brilliant Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=t73-round-brilliant","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/t73-round-brilliant","moissanite":"https://digitalgemology.com/gemstones/moissanite/t73-round-brilliant","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/t73-round-brilliant","ruby":"https://digitalgemology.com/gemstones/ruby/t73-round-brilliant","sapphire":"https://digitalgemology.com/gemstones/sapphire/t73-round-brilliant","emerald":"https://digitalgemology.com/gemstones/emerald/t73-round-brilliant","amethyst":"https://digitalgemology.com/gemstones/amethyst/t73-round-brilliant"}},{"slug":"t105-round-brilliant","name":"T105 Round Brilliant Cut","url":"https://digitalgemology.com/cuts/t105-round-brilliant","markdown":"https://digitalgemology.com/cuts/t105-round-brilliant.md","category":"Brilliants","category_id":"brilliants","shape":"round","facets":105,"size":"8.19 x 8.19 mm","summary":"The 1919 round brilliant with 48 more facets and no girdle band: like the T57, its crown and pavilion meet at a knife edge. The main facets keep their angles; the added facets are cut a little steeper and divide the plan more finely.","description":"T105 Round Brilliant Cut 3D model and GemCad faceting diagram: 105 facets, 8.19 x 8.19 x 4.86 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Brilliants","Facets":"105 planar facets","Outline":"Length to width 1.000","Total depth":"59.3% of width","Crown angle (main)":"34.5°","Pavilion angle (main)":"40.8°","Reference size":"8.19 x 8.19 x 4.86 mm at 1.84 ct in diamond","Volume":"104.32 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.002° of the 3D model (average under 0.001°)","Index gear":"96","Symmetry":"8-fold mirror-image symmetry","Tiers":"4 crown, 5 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":95,"fire":77,"scintillation":90,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":86,"fire":97,"scintillation":90,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest fire"]},"cubic-zirconia":{"brilliance":98,"fire":85,"scintillation":90,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest brilliance"]},"ruby":{"brilliance":90,"fire":36,"scintillation":90,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":90,"fire":36,"scintillation":90,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":71,"fire":34,"scintillation":90,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":65,"fire":31,"scintillation":90,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.84 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.68 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.03 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.09 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.09 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.42 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.38 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"T105 Round Brilliant Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/44e9f0a8-a8b8-4d78-b1a5-d837fbd8c845","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"T105 Round Brilliant Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/98e0f644-c9d1-48ba-aeab-d5a37f506f70","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the T105 Round Brilliant Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 105 planar facets."},{"question":"Is there a faceting diagram for the T105 Round Brilliant Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (105 facets, 96 index, 8-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the T105 Round Brilliant Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the T105 Round Brilliant Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.002° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the T105 Round Brilliant Cut model, and what does it weigh?","answer":"The model measures 8.19 x 8.19 x 4.86 mm, which is 1.84 ct in diamond. The same size weighs 1.68 ct in moissanite, 3.03 ct in cubic zirconia, 2.09 ct in ruby, 2.09 ct in sapphire, 1.42 ct in emerald, 1.38 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the T105 Round Brilliant Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=t105-round-brilliant","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/t105-round-brilliant","moissanite":"https://digitalgemology.com/gemstones/moissanite/t105-round-brilliant","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/t105-round-brilliant","ruby":"https://digitalgemology.com/gemstones/ruby/t105-round-brilliant","sapphire":"https://digitalgemology.com/gemstones/sapphire/t105-round-brilliant","emerald":"https://digitalgemology.com/gemstones/emerald/t105-round-brilliant","amethyst":"https://digitalgemology.com/gemstones/amethyst/t105-round-brilliant"}},{"slug":"dg-vitruvio","name":"DG-Vitruvio Cut","url":"https://digitalgemology.com/cuts/dg-vitruvio","markdown":"https://digitalgemology.com/cuts/dg-vitruvio.md","category":"Brilliants","category_id":"brilliants","shape":"round","facets":265,"size":"8.15 x 8.15 mm","summary":"DG-Vitruvio is the 1919 round brilliant plan at its finest subdivision: the 57 facets of the T-series, with the girdle resolved into a band of 96 facets. The crown and pavilion keep the classic proportions; all the extra work sits at the girdle.","description":"DG-Vitruvio Cut 3D model and GemCad faceting diagram: 265 facets, 8.15 x 8.15 x 5.05 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Brilliants","Facets":"57 + 96 girdles = 153 facets in the cutting design; the 3D model has 265 planar faces","Outline":"Length to width 1.000","Total depth":"61.9% of width","Crown angle (main)":"34.5°","Pavilion angle (main)":"40.8°","Reference size":"8.15 x 8.15 x 5.05 mm at 2.01 ct in diamond","Volume":"114.12 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.002° of the 3D model (average under 0.001°); the girdle band differs by up to 1.6°, because the 3D model's girdle is more finely divided than the cutting file's","Index gear":"96","Symmetry":"8-fold mirror-image symmetry","Tiers":"3 crown, 2 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":93,"fire":79,"scintillation":98,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":86,"fire":97,"scintillation":98,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":98,"fire":87,"scintillation":98,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest brilliance"]},"ruby":{"brilliance":94,"fire":37,"scintillation":98,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":94,"fire":37,"scintillation":98,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":78,"fire":40,"scintillation":98,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":71,"fire":36,"scintillation":98,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.01 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.84 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.31 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.28 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.28 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.55 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.51 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"DG-Vitruvio Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/8b7e2e3a-e008-4a2f-9bbe-a04552795fc0","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"DG-Vitruvio Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/75e6d066-b6ce-4a13-8585-55ab3b6188fe","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the DG-Vitruvio Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 265 planar facets."},{"question":"Is there a faceting diagram for the DG-Vitruvio Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (57 + 96 girdles = 153 facets, 96 index, 8-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the DG-Vitruvio Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the DG-Vitruvio Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.002° of the 3D model (average under 0.001°); the girdle band differs by up to 1.6°, because the 3D model's girdle is more finely divided than the cutting file's. The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the DG-Vitruvio Cut model, and what does it weigh?","answer":"The model measures 8.15 x 8.15 x 5.05 mm, which is 2.01 ct in diamond. The same size weighs 1.84 ct in moissanite, 3.31 ct in cubic zirconia, 2.28 ct in ruby, 2.28 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the DG-Vitruvio Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=dg-vitruvio","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/dg-vitruvio","moissanite":"https://digitalgemology.com/gemstones/moissanite/dg-vitruvio","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-vitruvio","ruby":"https://digitalgemology.com/gemstones/ruby/dg-vitruvio","sapphire":"https://digitalgemology.com/gemstones/sapphire/dg-vitruvio","emerald":"https://digitalgemology.com/gemstones/emerald/dg-vitruvio","amethyst":"https://digitalgemology.com/gemstones/amethyst/dg-vitruvio"}},{"slug":"dg-anteros","name":"DG-Anteros Cut","url":"https://digitalgemology.com/cuts/dg-anteros","markdown":"https://digitalgemology.com/cuts/dg-anteros.md","category":"Brilliants","category_id":"brilliants","shape":"round","facets":73,"size":"8.15 x 8.15 mm","summary":"DG-Anteros is a 73-facet round brilliant re-solved for moissanite. It keeps the T73's architecture and 53% table, eases the crown and shifts the pavilion cone, because moissanite bends light more strongly than the diamond the 1919 proportions were worked out for.","description":"DG-Anteros Cut 3D model and GemCad faceting diagram: 73 facets, 8.15 x 8.15 x 4.84 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Brilliants","Facets":"73 planar facets (57 + 16 girdles = 73)","Outline":"Length to width 1.000","Total depth":"59.4% of width","Table":"53.5% of width","Crown angle (main)":"33.0°","Pavilion angle (main)":"40.1°","Reference size":"8.15 x 8.15 x 4.84 mm at 1.91 ct in diamond","Volume":"108.58 mm³","Cutting file accuracy":"Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°)","Index gear":"96","Symmetry":"8-fold mirror-image symmetry","Tiers":"3 crown, 2 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":95,"fire":74,"scintillation":80,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":92,"fire":91,"scintillation":80,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest fire"]},"cubic-zirconia":{"brilliance":92,"fire":82,"scintillation":80,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":[]},"ruby":{"brilliance":97,"fire":43,"scintillation":80,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":97,"fire":43,"scintillation":80,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":86,"fire":52,"scintillation":80,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":82,"fire":54,"scintillation":80,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.91 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.75 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.15 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.17 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.17 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.48 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"76%","weight_at_reference_size":"1.44 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"DG-Anteros Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/2e4ad6fb-622c-4a41-b045-eab18e4b961d","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"DG-Anteros Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/54188a37-b56f-4120-a93c-c783b2e18a49","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the DG-Anteros Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 73 planar facets."},{"question":"Is there a faceting diagram for the DG-Anteros Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (57 + 16 girdles = 73 facets, 96 index, 8-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the DG-Anteros Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, the whole pavilion reflects head-on light; in Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 40.1°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for amethyst."},{"question":"How accurate is the DG-Anteros Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the DG-Anteros Cut model, and what does it weigh?","answer":"The model measures 8.15 x 8.15 x 4.84 mm, which is 1.91 ct in diamond. The same size weighs 1.75 ct in moissanite, 3.15 ct in cubic zirconia, 2.17 ct in ruby, 2.17 ct in sapphire, 1.48 ct in emerald, 1.44 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the DG-Anteros Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=dg-anteros","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/dg-anteros","moissanite":"https://digitalgemology.com/gemstones/moissanite/dg-anteros","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-anteros","ruby":"https://digitalgemology.com/gemstones/ruby/dg-anteros","sapphire":"https://digitalgemology.com/gemstones/sapphire/dg-anteros","emerald":"https://digitalgemology.com/gemstones/emerald/dg-anteros","amethyst":"https://digitalgemology.com/gemstones/amethyst/dg-anteros"}},{"slug":"baguette","name":"Baguette Cut","url":"https://digitalgemology.com/cuts/baguette","markdown":"https://digitalgemology.com/cuts/baguette.md","category":"Jewelry cuts","category_id":"jewelry","shape":"elongated","facets":21,"size":"9.60 x 4.86 mm","summary":"The baguette: a slim rectangular step cut with few facets and straight, clean lines. It is the classic side stone beside a larger centre stone, and the building block of channel-set bands.","description":"Baguette Cut 3D model and GemCad faceting diagram: 21 facets, 9.60 x 4.86 x 3.25 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"21 planar facets (17 + 4 girdles = 21)","Outline":"Length to width 1.974","Total depth":"66.8% of width","Crown angle (main)":"45.0°","Pavilion angle (main)":"32.4°","Reference size":"9.60 x 4.86 x 3.25 mm at 1.52 ct in diamond","Volume":"86.34 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.336° of the 3D model (average 0.247°); girdle facets within 0.436°","Index gear":"96","Symmetry":"2-fold mirror-image symmetry","Tiers":"2 crown, 6 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":40,"fire":62,"scintillation":43,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":32,"fire":75,"scintillation":43,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":[]},"cubic-zirconia":{"brilliance":46,"fire":81,"scintillation":43,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest fire"]},"ruby":{"brilliance":53,"fire":53,"scintillation":43,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":53,"fire":53,"scintillation":43,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":42,"fire":58,"scintillation":43,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":40,"fire":59,"scintillation":43,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.52 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.39 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.50 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"78%","weight_at_reference_size":"1.73 ct","verdict":"Steepen the pavilion"},"sapphire":{"pavilion_reflecting_head_on_light":"78%","weight_at_reference_size":"1.73 ct","verdict":"Steepen the pavilion"},"emerald":{"pavilion_reflecting_head_on_light":"78%","weight_at_reference_size":"1.17 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"78%","weight_at_reference_size":"1.14 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Baguette Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/f98a5f9b-a25e-4ed5-a5cc-92444ae9b2a0","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Baguette Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/f0f3b8ec-9290-43b0-a5a0-f230c2d4fa1f","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Baguette Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 21 planar facets."},{"question":"Is there a faceting diagram for the Baguette Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (17 + 4 girdles = 21 facets, 96 index, 2-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Baguette Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, the whole pavilion reflects head-on light; in Ruby, Sapphire, Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 32.4°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for diamond, moissanite, cubic zirconia, ruby, sapphire, emerald, amethyst."},{"question":"How accurate is the Baguette Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.336° of the 3D model (average 0.247°); girdle facets within 0.436°. The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Baguette Cut model, and what does it weigh?","answer":"The model measures 9.60 x 4.86 x 3.25 mm, which is 1.52 ct in diamond. The same size weighs 1.39 ct in moissanite, 2.50 ct in cubic zirconia, 1.73 ct in ruby, 1.73 ct in sapphire, 1.17 ct in emerald, 1.14 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Baguette Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=baguette","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/baguette","moissanite":"https://digitalgemology.com/gemstones/moissanite/baguette","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/baguette","ruby":"https://digitalgemology.com/gemstones/ruby/baguette","sapphire":"https://digitalgemology.com/gemstones/sapphire/baguette","emerald":"https://digitalgemology.com/gemstones/emerald/baguette","amethyst":"https://digitalgemology.com/gemstones/amethyst/baguette"}},{"slug":"emerald-cut","name":"Emerald Cut","url":"https://digitalgemology.com/cuts/emerald-cut","markdown":"https://digitalgemology.com/cuts/emerald-cut.md","category":"Jewelry cuts","category_id":"jewelry","shape":"elongated","facets":57,"size":"8.47 x 5.65 mm","summary":"The emerald cut: a rectangular step cut with cropped corners and a long, open table. The cropped corners protect a brittle stone at its weakest points, which is how the cut earned its name.","description":"Emerald Cut 3D model and GemCad faceting diagram: 57 facets, 8.47 x 5.65 x 3.88 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"57 planar facets (49 + 8 girdles = 57)","Outline":"Length to width 1.500","Total depth":"68.6% of width","Crown angle (main)":"37.0°","Pavilion angle (main)":"41.0°","Reference size":"8.47 x 5.65 x 3.88 mm at 1.52 ct in diamond","Volume":"86.34 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.003° of the 3D model (average under 0.001°); girdle facets within 0.024°","Index gear":"64","Symmetry":"2-fold mirror-image symmetry","Tiers":"9 crown, 8 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":55,"fire":87,"scintillation":72,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":51,"fire":95,"scintillation":72,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":59,"fire":92,"scintillation":72,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall"]},"ruby":{"brilliance":65,"fire":47,"scintillation":72,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":65,"fire":47,"scintillation":72,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":58,"fire":36,"scintillation":72,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":53,"fire":32,"scintillation":72,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.52 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.39 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.50 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.73 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.73 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.17 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.14 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"Emerald Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/7a254e34-3548-40df-9016-7f9f42e19852","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Emerald Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/6fc2df4f-3220-428e-94ba-367bdcc8ecb6","contents":[{"format":".asc","use":"GemCad design file, 64 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Emerald Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 57 planar facets."},{"question":"Is there a faceting diagram for the Emerald Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (49 + 8 girdles = 57 facets, 64 index, 2-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Emerald Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the Emerald Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.003° of the 3D model (average under 0.001°); girdle facets within 0.024°. The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Emerald Cut model, and what does it weigh?","answer":"The model measures 8.47 x 5.65 x 3.88 mm, which is 1.52 ct in diamond. The same size weighs 1.39 ct in moissanite, 2.50 ct in cubic zirconia, 1.73 ct in ruby, 1.73 ct in sapphire, 1.17 ct in emerald, 1.14 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Emerald Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=emerald-cut","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/emerald-cut","moissanite":"https://digitalgemology.com/gemstones/moissanite/emerald-cut","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/emerald-cut","ruby":"https://digitalgemology.com/gemstones/ruby/emerald-cut","sapphire":"https://digitalgemology.com/gemstones/sapphire/emerald-cut","emerald":"https://digitalgemology.com/gemstones/emerald/emerald-cut","amethyst":"https://digitalgemology.com/gemstones/amethyst/emerald-cut"}},{"slug":"marquise","name":"Marquise Cut","url":"https://digitalgemology.com/cuts/marquise","markdown":"https://digitalgemology.com/cuts/marquise.md","category":"Jewelry cuts","category_id":"jewelry","shape":"elongated","facets":87,"size":"12.22 x 5.93 mm","summary":"The marquise, or navette: an elongated brilliant pointed at both ends. For its weight it has the largest face-up area of any classic shape, which makes a stone look bigger on the finger.","description":"Marquise Cut 3D model and GemCad faceting diagram: 87 facets, 12.22 x 5.93 x 3.68 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"87 planar facets (67 + 20 girdles = 87)","Outline":"Length to width 2.059","Total depth":"62.0% of width","Crown angle (main)":"38.0°","Pavilion angle (main)":"31.4°","Reference size":"12.22 x 5.93 x 3.68 mm at 1.59 ct in diamond","Volume":"90.23 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.010° of the 3D model (average 0.002°)","Index gear":"64","Symmetry":"2-fold mirror-image symmetry","Tiers":"10 crown, 8 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":64,"fire":89,"scintillation":86,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":59,"fire":94,"scintillation":86,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":66,"fire":93,"scintillation":86,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest brilliance"]},"ruby":{"brilliance":55,"fire":54,"scintillation":86,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":55,"fire":54,"scintillation":86,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":43,"fire":51,"scintillation":86,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":38,"fire":48,"scintillation":86,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.59 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.45 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.62 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"54%","weight_at_reference_size":"1.80 ct","verdict":"Steepen the pavilion"},"sapphire":{"pavilion_reflecting_head_on_light":"54%","weight_at_reference_size":"1.80 ct","verdict":"Steepen the pavilion"},"emerald":{"pavilion_reflecting_head_on_light":"43%","weight_at_reference_size":"1.23 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"43%","weight_at_reference_size":"1.20 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Marquise Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/dbc4977f-fe54-4713-9e6c-49d605979d87","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Marquise Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/db916c99-ad50-4c57-9c0d-72a0a635dee2","contents":[{"format":".asc","use":"GemCad design file, 64 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Marquise Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 87 planar facets."},{"question":"Is there a faceting diagram for the Marquise Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (67 + 20 girdles = 87 facets, 64 index, 2-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Marquise Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, the whole pavilion reflects head-on light; in Ruby, Sapphire, Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 31.4°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for diamond, moissanite, cubic zirconia, ruby, sapphire, emerald, amethyst."},{"question":"How accurate is the Marquise Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.010° of the 3D model (average 0.002°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Marquise Cut model, and what does it weigh?","answer":"The model measures 12.22 x 5.93 x 3.68 mm, which is 1.59 ct in diamond. The same size weighs 1.45 ct in moissanite, 2.62 ct in cubic zirconia, 1.80 ct in ruby, 1.80 ct in sapphire, 1.23 ct in emerald, 1.20 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Marquise Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=marquise","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/marquise","moissanite":"https://digitalgemology.com/gemstones/moissanite/marquise","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/marquise","ruby":"https://digitalgemology.com/gemstones/ruby/marquise","sapphire":"https://digitalgemology.com/gemstones/sapphire/marquise","emerald":"https://digitalgemology.com/gemstones/emerald/marquise","amethyst":"https://digitalgemology.com/gemstones/amethyst/marquise"}},{"slug":"oval","name":"Oval Cut","url":"https://digitalgemology.com/cuts/oval","markdown":"https://digitalgemology.com/cuts/oval.md","category":"Jewelry cuts","category_id":"jewelry","shape":"elongated","facets":97,"size":"9.00 x 6.76 mm","summary":"The oval brilliant: an elongated round, with the brilliant facet plan stretched along one axis. It faces up larger than a round of the same weight and flatters the finger.","description":"Oval Cut 3D model and GemCad faceting diagram: 97 facets, 9.00 x 6.76 x 4.33 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"73 + 20 girdles = 93 facets in the cutting design; the 3D model has 97 planar faces","Outline":"Length to width 1.331","Total depth":"64.0% of width","Crown angle (main)":"35.0°","Pavilion angle (main)":"41.0°","Reference size":"9.00 x 6.76 x 4.33 mm at 1.60 ct in diamond","Volume":"91.06 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.330° of the 3D model (average 0.049°)","Index gear":"96","Symmetry":"2-fold mirror-image symmetry","Tiers":"11 crown, 8 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":47,"fire":92,"scintillation":87,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":38,"fire":95,"scintillation":87,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":[]},"cubic-zirconia":{"brilliance":63,"fire":96,"scintillation":87,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest fire"]},"ruby":{"brilliance":66,"fire":74,"scintillation":87,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":66,"fire":74,"scintillation":87,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":55,"fire":71,"scintillation":87,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":52,"fire":69,"scintillation":87,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.60 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.47 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.64 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.82 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.82 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"55%","weight_at_reference_size":"1.24 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"39%","weight_at_reference_size":"1.21 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Oval Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/ce77b9f0-180a-4d41-b13f-f0b5f9e02b99","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Oval Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/b82abdce-69d2-46a4-819d-1a075b50fe92","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Oval Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 97 planar facets."},{"question":"Is there a faceting diagram for the Oval Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (73 + 20 girdles = 93 facets, 96 index, 2-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Oval Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, the whole pavilion reflects head-on light; in Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised."},{"question":"How accurate is the Oval Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.330° of the 3D model (average 0.049°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Oval Cut model, and what does it weigh?","answer":"The model measures 9.00 x 6.76 x 4.33 mm, which is 1.60 ct in diamond. The same size weighs 1.47 ct in moissanite, 2.64 ct in cubic zirconia, 1.82 ct in ruby, 1.82 ct in sapphire, 1.24 ct in emerald, 1.21 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Oval Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=oval","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/oval","moissanite":"https://digitalgemology.com/gemstones/moissanite/oval","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/oval","ruby":"https://digitalgemology.com/gemstones/ruby/oval","sapphire":"https://digitalgemology.com/gemstones/sapphire/oval","emerald":"https://digitalgemology.com/gemstones/emerald/oval","amethyst":"https://digitalgemology.com/gemstones/amethyst/oval"}},{"slug":"pear","name":"Pear Cut","url":"https://digitalgemology.com/cuts/pear","markdown":"https://digitalgemology.com/cuts/pear.md","category":"Jewelry cuts","category_id":"jewelry","shape":"elongated","facets":64,"size":"10.28 x 6.84 mm","summary":"The pear: a brilliant with one rounded end and one point, halfway between an oval and a marquise.","description":"Pear Cut 3D model and GemCad faceting diagram: 64 facets, 10.28 x 6.84 x 4.11 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"64 planar facets (50 + 14 girdles = 64)","Outline":"Length to width 1.502","Total depth":"60.0% of width","Crown angle (main)":"33.0°","Pavilion angle (main)":"34.9°","Reference size":"10.28 x 6.84 x 4.11 mm at 1.59 ct in diamond","Volume":"90.53 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.137° of the 3D model (average 0.006°)","Index gear":"64","Symmetry":"1-fold mirror-image symmetry","Tiers":"15 crown, 10 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":53,"fire":84,"scintillation":76,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":49,"fire":95,"scintillation":76,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":59,"fire":90,"scintillation":76,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall"]},"ruby":{"brilliance":62,"fire":56,"scintillation":76,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":62,"fire":56,"scintillation":76,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":56,"fire":59,"scintillation":76,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":52,"fire":60,"scintillation":76,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.59 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.46 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.63 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"84%","weight_at_reference_size":"1.81 ct","verdict":"Steepen the pavilion"},"sapphire":{"pavilion_reflecting_head_on_light":"84%","weight_at_reference_size":"1.81 ct","verdict":"Steepen the pavilion"},"emerald":{"pavilion_reflecting_head_on_light":"52%","weight_at_reference_size":"1.23 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"52%","weight_at_reference_size":"1.20 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Pear Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/19f3d75d-2a04-447b-b0f8-19c1445e9a2e","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Pear Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/d889ac63-e435-420a-a780-1ffe91601386","contents":[{"format":".asc","use":"GemCad design file, 64 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Pear Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 64 planar facets."},{"question":"Is there a faceting diagram for the Pear Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (50 + 14 girdles = 64 facets, 64 index, 1-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Pear Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, the whole pavilion reflects head-on light; in Ruby, Sapphire, Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 34.9°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for diamond, moissanite, cubic zirconia, ruby, sapphire, emerald, amethyst."},{"question":"How accurate is the Pear Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.137° of the 3D model (average 0.006°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Pear Cut model, and what does it weigh?","answer":"The model measures 10.28 x 6.84 x 4.11 mm, which is 1.59 ct in diamond. The same size weighs 1.46 ct in moissanite, 2.63 ct in cubic zirconia, 1.81 ct in ruby, 1.81 ct in sapphire, 1.23 ct in emerald, 1.20 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Pear Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=pear","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/pear","moissanite":"https://digitalgemology.com/gemstones/moissanite/pear","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/pear","ruby":"https://digitalgemology.com/gemstones/ruby/pear","sapphire":"https://digitalgemology.com/gemstones/sapphire/pear","emerald":"https://digitalgemology.com/gemstones/emerald/pear","amethyst":"https://digitalgemology.com/gemstones/amethyst/pear"}},{"slug":"radiant","name":"Radiant Cut","url":"https://digitalgemology.com/cuts/radiant","markdown":"https://digitalgemology.com/cuts/radiant.md","category":"Jewelry cuts","category_id":"jewelry","shape":"elongated","facets":74,"size":"9.06 x 7.06 mm","summary":"The radiant: the outline of a step cut, with cropped corners, carrying a brilliant facet plan. It combines the clean shape of an emerald cut with the sparkle of a brilliant.","description":"Radiant Cut 3D model in STEP, STL, OBJ, GLB, FBX and 3DM: 74 facets, 9.06 x 7.06 x 3.79 mm, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"74 planar facets","Outline":"Length to width 1.284","Total depth":"53.8% of width","Crown angle (main)":"38.5°","Pavilion angle (main)":"30.0°","Reference size":"9.06 x 7.06 x 3.79 mm at 2.00 ct in diamond","Volume":"113.74 mm³","Files":"STEP, 3DM, STL, OBJ, FBX, GLB"},"performance":{"diamond":{"brilliance":32,"fire":77,"scintillation":74,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":33,"fire":92,"scintillation":74,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest brilliance","Highest fire"]},"cubic-zirconia":{"brilliance":33,"fire":91,"scintillation":74,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Highest brilliance"]},"ruby":{"brilliance":26,"fire":69,"scintillation":74,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":26,"fire":69,"scintillation":74,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":22,"fire":56,"scintillation":74,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":20,"fire":41,"scintillation":74,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"96%","weight_at_reference_size":"2.00 ct","verdict":"Minor windowing"},"moissanite":{"pavilion_reflecting_head_on_light":"96%","weight_at_reference_size":"1.83 ct","verdict":"Minor windowing"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"96%","weight_at_reference_size":"3.30 ct","verdict":"Minor windowing"},"ruby":{"pavilion_reflecting_head_on_light":"38%","weight_at_reference_size":"2.27 ct","verdict":"Steepen the pavilion"},"sapphire":{"pavilion_reflecting_head_on_light":"38%","weight_at_reference_size":"2.27 ct","verdict":"Steepen the pavilion"},"emerald":{"pavilion_reflecting_head_on_light":"29%","weight_at_reference_size":"1.55 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"29%","weight_at_reference_size":"1.51 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Radiant Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/37db9344-72d1-4dac-89e9-88dc3539c639","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]}],"faq":[{"question":"What files come with the Radiant Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 74 planar facets."},{"question":"Is there a faceting diagram for the Radiant Cut?","answer":"The faceting design for the Radiant Cut is in preparation and will contain a GemCad file, a tier table and a printable diagram. The 3D files are available now."},{"question":"Does the Radiant Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In none of the seven stones does the whole pavilion reflect head-on light; in Ruby, Sapphire, Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised."},{"question":"How accurate is the Radiant Cut cutting file?","answer":"The cutting file for the Radiant Cut is in preparation. Every cutting file we publish is checked facet by facet against its 3D model before it goes on sale."},{"question":"How big is the Radiant Cut model, and what does it weigh?","answer":"The model measures 9.06 x 7.06 x 3.79 mm, which is 2.00 ct in diamond. The same size weighs 1.83 ct in moissanite, 3.30 ct in cubic zirconia, 2.27 ct in ruby, 2.27 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Radiant Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=radiant","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/radiant","moissanite":"https://digitalgemology.com/gemstones/moissanite/radiant","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/radiant","ruby":"https://digitalgemology.com/gemstones/ruby/radiant","sapphire":"https://digitalgemology.com/gemstones/sapphire/radiant","emerald":"https://digitalgemology.com/gemstones/emerald/radiant","amethyst":"https://digitalgemology.com/gemstones/amethyst/radiant"}},{"slug":"rectangle","name":"Rectangle Cut","url":"https://digitalgemology.com/cuts/rectangle","markdown":"https://digitalgemology.com/cuts/rectangle.md","category":"Jewelry cuts","category_id":"jewelry","shape":"elongated","facets":45,"size":"8.87 x 5.89 mm","summary":"A rectangular step cut with clean, wide steps and square corners. Simpler than an emerald cut, with no cropped corners.","description":"Rectangle Cut 3D model and GemCad faceting diagram: 45 facets, 8.87 x 5.89 x 3.65 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"45 planar facets (41 + 4 girdles = 45)","Outline":"Length to width 1.506","Total depth":"62.0% of width","Crown angle (main)":"19.5°","Pavilion angle (main)":"33.5°","Reference size":"8.87 x 5.89 x 3.65 mm at 1.56 ct in diamond","Volume":"88.76 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.016° of the 3D model (average 0.004°)","Index gear":"96","Symmetry":"2-fold mirror-image symmetry","Tiers":"7 crown, 7 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":50,"fire":77,"scintillation":63,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":50,"fire":90,"scintillation":63,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest fire"]},"cubic-zirconia":{"brilliance":51,"fire":87,"scintillation":63,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Highest brilliance"]},"ruby":{"brilliance":41,"fire":58,"scintillation":63,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":41,"fire":58,"scintillation":63,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":29,"fire":55,"scintillation":63,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":24,"fire":50,"scintillation":63,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.56 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.43 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.57 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"62%","weight_at_reference_size":"1.78 ct","verdict":"Steepen the pavilion"},"sapphire":{"pavilion_reflecting_head_on_light":"62%","weight_at_reference_size":"1.78 ct","verdict":"Steepen the pavilion"},"emerald":{"pavilion_reflecting_head_on_light":"27%","weight_at_reference_size":"1.21 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"19%","weight_at_reference_size":"1.18 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Rectangle Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/1e627cbe-69a3-44f0-a5da-e5cab29131b8","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Rectangle Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/1d8e7f45-2f16-44f2-8215-0aea13e29c3b","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Rectangle Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 45 planar facets."},{"question":"Is there a faceting diagram for the Rectangle Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (41 + 4 girdles = 45 facets, 96 index, 2-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Rectangle Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, the whole pavilion reflects head-on light; in Ruby, Sapphire, Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 33.5°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for diamond, moissanite, cubic zirconia, ruby, sapphire, emerald, amethyst."},{"question":"How accurate is the Rectangle Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.016° of the 3D model (average 0.004°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Rectangle Cut model, and what does it weigh?","answer":"The model measures 8.87 x 5.89 x 3.65 mm, which is 1.56 ct in diamond. The same size weighs 1.43 ct in moissanite, 2.57 ct in cubic zirconia, 1.78 ct in ruby, 1.78 ct in sapphire, 1.21 ct in emerald, 1.18 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Rectangle Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=rectangle","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/rectangle","moissanite":"https://digitalgemology.com/gemstones/moissanite/rectangle","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/rectangle","ruby":"https://digitalgemology.com/gemstones/ruby/rectangle","sapphire":"https://digitalgemology.com/gemstones/sapphire/rectangle","emerald":"https://digitalgemology.com/gemstones/emerald/rectangle","amethyst":"https://digitalgemology.com/gemstones/amethyst/rectangle"}},{"slug":"teardrop","name":"Teardrop Cut","url":"https://digitalgemology.com/cuts/teardrop","markdown":"https://digitalgemology.com/cuts/teardrop.md","category":"Jewelry cuts","category_id":"jewelry","shape":"elongated","facets":74,"size":"10.10 x 6.99 mm","summary":"A softened pear outline with a fuller shoulder, rounder and more forgiving than the classic pear.","description":"Teardrop Cut 3D model and GemCad faceting diagram: 74 facets, 10.10 x 6.99 x 4.19 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"74 planar facets (56 + 18 girdles = 74)","Outline":"Length to width 1.445","Total depth":"60.0% of width","Crown angle (main)":"28.0°","Pavilion angle (main)":"38.5°","Reference size":"10.10 x 6.99 x 4.19 mm at 1.59 ct in diamond","Volume":"90.50 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.088° of the 3D model (average 0.007°)","Index gear":"64","Symmetry":"1-fold mirror-image symmetry","Tiers":"19 crown, 9 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":46,"fire":89,"scintillation":81,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":39,"fire":96,"scintillation":81,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":55,"fire":95,"scintillation":81,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall"]},"ruby":{"brilliance":59,"fire":64,"scintillation":81,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":59,"fire":64,"scintillation":81,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":54,"fire":63,"scintillation":81,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":49,"fire":60,"scintillation":81,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.59 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.46 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.62 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.81 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.81 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"52%","weight_at_reference_size":"1.23 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"43%","weight_at_reference_size":"1.20 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Teardrop Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/01c7537a-8b6a-442f-867e-ae2a8b7c65d8","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Teardrop Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/a8b50d8b-0e3a-4a12-a271-9683c321c40c","contents":[{"format":".asc","use":"GemCad design file, 64 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Teardrop Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 74 planar facets."},{"question":"Is there a faceting diagram for the Teardrop Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (56 + 18 girdles = 74 facets, 64 index, 1-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Teardrop Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, the whole pavilion reflects head-on light; in Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 38.5°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for diamond, moissanite, emerald, amethyst."},{"question":"How accurate is the Teardrop Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.088° of the 3D model (average 0.007°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Teardrop Cut model, and what does it weigh?","answer":"The model measures 10.10 x 6.99 x 4.19 mm, which is 1.59 ct in diamond. The same size weighs 1.46 ct in moissanite, 2.62 ct in cubic zirconia, 1.81 ct in ruby, 1.81 ct in sapphire, 1.23 ct in emerald, 1.20 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Teardrop Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=teardrop","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/teardrop","moissanite":"https://digitalgemology.com/gemstones/moissanite/teardrop","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/teardrop","ruby":"https://digitalgemology.com/gemstones/ruby/teardrop","sapphire":"https://digitalgemology.com/gemstones/sapphire/teardrop","emerald":"https://digitalgemology.com/gemstones/emerald/teardrop","amethyst":"https://digitalgemology.com/gemstones/amethyst/teardrop"}},{"slug":"asscher","name":"Asscher Cut","url":"https://digitalgemology.com/cuts/asscher","markdown":"https://digitalgemology.com/cuts/asscher.md","category":"Jewelry cuts","category_id":"jewelry","shape":"square","facets":58,"size":"6.77 x 6.77 mm","summary":"The Asscher: a square step cut with deeply cropped corners, which give it an octagonal outline and the concentric 'hall of mirrors' look of its stepped pavilion.","description":"Asscher Cut 3D model and GemCad faceting diagram: 58 facets, 6.77 x 6.77 x 4.08 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"58 planar facets","Outline":"Length to width 1.000","Total depth":"60.4% of width","Crown angle (main)":"38.0°","Pavilion angle (main)":"27.6°","Reference size":"6.77 x 6.77 x 4.08 mm at 1.52 ct in diamond","Volume":"86.34 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.058° of the 3D model (average 0.044°)","Index gear":"96","Symmetry":"4-fold symmetry","Tiers":"8 crown, 6 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":69,"fire":80,"scintillation":72,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":64,"fire":94,"scintillation":72,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":74,"fire":88,"scintillation":72,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest brilliance"]},"ruby":{"brilliance":68,"fire":53,"scintillation":72,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":68,"fire":53,"scintillation":72,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":62,"fire":55,"scintillation":72,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":60,"fire":52,"scintillation":72,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.52 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.39 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"97%","weight_at_reference_size":"2.50 ct","verdict":"Minor windowing"},"ruby":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"1.73 ct","verdict":"Steepen the pavilion"},"sapphire":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"1.73 ct","verdict":"Steepen the pavilion"},"emerald":{"pavilion_reflecting_head_on_light":"79%","weight_at_reference_size":"1.17 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"56%","weight_at_reference_size":"1.14 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Asscher Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/3f478563-162b-489c-afd5-5086170b053f","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Asscher Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/6113a4c7-5d19-46be-99a5-0f365e8f6c18","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Asscher Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 58 planar facets."},{"question":"Is there a faceting diagram for the Asscher Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (58 facets, 96 index, 4-fold symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Asscher Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, the whole pavilion reflects head-on light; in Ruby, Sapphire, Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 27.6°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for diamond, moissanite, cubic zirconia, ruby, sapphire, emerald, amethyst."},{"question":"How accurate is the Asscher Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.058° of the 3D model (average 0.044°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Asscher Cut model, and what does it weigh?","answer":"The model measures 6.77 x 6.77 x 4.08 mm, which is 1.52 ct in diamond. The same size weighs 1.39 ct in moissanite, 2.50 ct in cubic zirconia, 1.73 ct in ruby, 1.73 ct in sapphire, 1.17 ct in emerald, 1.14 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Asscher Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=asscher","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/asscher","moissanite":"https://digitalgemology.com/gemstones/moissanite/asscher","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/asscher","ruby":"https://digitalgemology.com/gemstones/ruby/asscher","sapphire":"https://digitalgemology.com/gemstones/sapphire/asscher","emerald":"https://digitalgemology.com/gemstones/emerald/asscher","amethyst":"https://digitalgemology.com/gemstones/amethyst/asscher"}},{"slug":"cushion","name":"Cushion Cut","url":"https://digitalgemology.com/cuts/cushion","markdown":"https://digitalgemology.com/cuts/cushion.md","category":"Jewelry cuts","category_id":"jewelry","shape":"square","facets":85,"size":"6.89 x 6.89 mm","summary":"The cushion: a square outline with rounded corners and a brilliant facet plan, descended from the old mine cut. It is soft in outline and generous in its flashes.","description":"Cushion Cut 3D model and GemCad faceting diagram: 85 facets, 6.89 x 6.89 x 4.48 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"85 planar facets (69 + 16 girdles = 85)","Outline":"Length to width 1.000","Total depth":"65.0% of width","Crown angle (main)":"33.5°","Pavilion angle (main)":"39.6°","Reference size":"6.89 x 6.89 x 4.48 mm at 1.51 ct in diamond","Volume":"85.85 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.007° of the 3D model (average 0.003°); girdle facets within 0.013°","Index gear":"96","Symmetry":"2-fold mirror-image symmetry","Tiers":"5 crown, 5 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":80,"fire":73,"scintillation":85,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":74,"fire":93,"scintillation":85,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":88,"fire":87,"scintillation":85,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest brilliance"]},"ruby":{"brilliance":88,"fire":36,"scintillation":85,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":88,"fire":36,"scintillation":85,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":74,"fire":27,"scintillation":85,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":69,"fire":24,"scintillation":85,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.51 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.38 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.49 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.72 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.72 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.17 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"85%","weight_at_reference_size":"1.14 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Cushion Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/0ab6b522-6f5e-4103-9be4-aa806b5cfb2b","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Cushion Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/5a6cedf6-d038-467c-a964-3cbfa3ad9e4e","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Cushion Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 85 planar facets."},{"question":"Is there a faceting diagram for the Cushion Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (69 + 16 girdles = 85 facets, 96 index, 2-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Cushion Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, the whole pavilion reflects head-on light; in Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 39.6°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for amethyst."},{"question":"How accurate is the Cushion Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.007° of the 3D model (average 0.003°); girdle facets within 0.013°. The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Cushion Cut model, and what does it weigh?","answer":"The model measures 6.89 x 6.89 x 4.48 mm, which is 1.51 ct in diamond. The same size weighs 1.38 ct in moissanite, 2.49 ct in cubic zirconia, 1.72 ct in ruby, 1.72 ct in sapphire, 1.17 ct in emerald, 1.14 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Cushion Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=cushion","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/cushion","moissanite":"https://digitalgemology.com/gemstones/moissanite/cushion","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/cushion","ruby":"https://digitalgemology.com/gemstones/ruby/cushion","sapphire":"https://digitalgemology.com/gemstones/sapphire/cushion","emerald":"https://digitalgemology.com/gemstones/emerald/cushion","amethyst":"https://digitalgemology.com/gemstones/amethyst/cushion"}},{"slug":"emerald-square","name":"Emerald Square Cut","url":"https://digitalgemology.com/cuts/emerald-square","markdown":"https://digitalgemology.com/cuts/emerald-square.md","category":"Jewelry cuts","category_id":"jewelry","shape":"square","facets":49,"size":"6.59 x 6.59 mm","summary":"The emerald step cut on a square outline, with cropped corners and concentric steps. Close in spirit to the Asscher, with a shallower, more open table.","description":"Emerald Square Cut 3D model and GemCad faceting diagram: 49 facets, 6.59 x 6.59 x 4.02 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"49 planar facets (41 + 8 girdles = 49)","Outline":"Length to width 1.000","Total depth":"61.0% of width","Crown angle (main)":"41.5°","Pavilion angle (main)":"28.2°","Reference size":"6.59 x 6.59 x 4.02 mm at 1.52 ct in diamond","Volume":"86.34 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.202° of the 3D model (average 0.148°); girdle facets within 0.264°","Index gear":"96","Symmetry":"4-fold symmetry","Tiers":"4 crown, 6 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":64,"fire":84,"scintillation":72,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":58,"fire":93,"scintillation":72,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":65,"fire":89,"scintillation":72,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall"]},"ruby":{"brilliance":71,"fire":53,"scintillation":72,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":71,"fire":53,"scintillation":72,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":66,"fire":46,"scintillation":72,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":61,"fire":40,"scintillation":72,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"97%","weight_at_reference_size":"1.52 ct","verdict":"Minor windowing"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.39 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"97%","weight_at_reference_size":"2.50 ct","verdict":"Minor windowing"},"ruby":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"1.73 ct","verdict":"Steepen the pavilion"},"sapphire":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"1.73 ct","verdict":"Steepen the pavilion"},"emerald":{"pavilion_reflecting_head_on_light":"81%","weight_at_reference_size":"1.17 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"81%","weight_at_reference_size":"1.14 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Emerald Square Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/d2388961-6665-40de-86ee-2fd2be7a4609","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Emerald Square Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/8cee9942-6697-487f-be59-4252debde079","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Emerald Square Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 49 planar facets."},{"question":"Is there a faceting diagram for the Emerald Square Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (41 + 8 girdles = 49 facets, 96 index, 4-fold symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Emerald Square Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Moissanite, the whole pavilion reflects head-on light; in Ruby, Sapphire, Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 28.2°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for diamond, moissanite, cubic zirconia, ruby, sapphire, emerald, amethyst."},{"question":"How accurate is the Emerald Square Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.202° of the 3D model (average 0.148°); girdle facets within 0.264°. The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Emerald Square Cut model, and what does it weigh?","answer":"The model measures 6.59 x 6.59 x 4.02 mm, which is 1.52 ct in diamond. The same size weighs 1.39 ct in moissanite, 2.50 ct in cubic zirconia, 1.73 ct in ruby, 1.73 ct in sapphire, 1.17 ct in emerald, 1.14 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Emerald Square Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=emerald-square","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/emerald-square","moissanite":"https://digitalgemology.com/gemstones/moissanite/emerald-square","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/emerald-square","ruby":"https://digitalgemology.com/gemstones/ruby/emerald-square","sapphire":"https://digitalgemology.com/gemstones/sapphire/emerald-square","emerald":"https://digitalgemology.com/gemstones/emerald/emerald-square","amethyst":"https://digitalgemology.com/gemstones/amethyst/emerald-square"}},{"slug":"princess","name":"Princess Cut","url":"https://digitalgemology.com/cuts/princess","markdown":"https://digitalgemology.com/cuts/princess.md","category":"Jewelry cuts","category_id":"jewelry","shape":"square","facets":93,"size":"6.46 x 6.46 mm","summary":"The princess: a square brilliant with sharp corners and chevron-patterned pavilion facets. It is the square cut that keeps the most weight from rough and gives the most sparkle for a square outline.","description":"Princess Cut 3D model and GemCad faceting diagram: 93 facets, 6.46 x 6.46 x 4.42 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"81 + 4 girdles = 85 facets in the cutting design; the 3D model has 93 planar faces","Outline":"Length to width 1.000","Total depth":"68.5% of width","Crown angle (main)":"25.0°","Pavilion angle (main)":"41.9°","Reference size":"6.46 x 6.46 x 4.42 mm at 1.45 ct in diamond","Volume":"82.54 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.060° of the 3D model (average 0.006°)","Index gear":"96","Symmetry":"4-fold mirror-image symmetry","Tiers":"6 crown, 6 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":57,"fire":83,"scintillation":78,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":51,"fire":95,"scintillation":78,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":63,"fire":92,"scintillation":78,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall"]},"ruby":{"brilliance":68,"fire":52,"scintillation":78,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":68,"fire":52,"scintillation":78,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":51,"fire":32,"scintillation":78,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":45,"fire":25,"scintillation":78,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.45 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.33 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.39 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.65 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.65 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.12 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.09 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"Princess Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/edd2f8c9-a099-4fc2-9104-a65a6561f764","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Princess Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/3fad41cf-2af3-441c-9603-4cbed8aadd95","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Princess Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 93 planar facets."},{"question":"Is there a faceting diagram for the Princess Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (81 + 4 girdles = 85 facets, 96 index, 4-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Princess Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the Princess Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.060° of the 3D model (average 0.006°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Princess Cut model, and what does it weigh?","answer":"The model measures 6.46 x 6.46 x 4.42 mm, which is 1.45 ct in diamond. The same size weighs 1.33 ct in moissanite, 2.39 ct in cubic zirconia, 1.65 ct in ruby, 1.65 ct in sapphire, 1.12 ct in emerald, 1.09 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Princess Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=princess","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/princess","moissanite":"https://digitalgemology.com/gemstones/moissanite/princess","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/princess","ruby":"https://digitalgemology.com/gemstones/ruby/princess","sapphire":"https://digitalgemology.com/gemstones/sapphire/princess","emerald":"https://digitalgemology.com/gemstones/emerald/princess","amethyst":"https://digitalgemology.com/gemstones/amethyst/princess"}},{"slug":"radiant-square","name":"Radiant Square Cut","url":"https://digitalgemology.com/cuts/radiant-square","markdown":"https://digitalgemology.com/cuts/radiant-square.md","category":"Jewelry cuts","category_id":"jewelry","shape":"square","facets":49,"size":"6.36 x 6.36 mm","summary":"The radiant on a square outline: cropped corners with a brilliant facet plan beneath.","description":"Radiant Square Cut 3D model and GemCad faceting diagram: 49 facets, 6.36 x 6.36 x 4.64 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"49 planar facets (41 + 8 girdles = 49)","Outline":"Length to width 1.000","Total depth":"72.8% of width","Crown angle (main)":"43.5°","Pavilion angle (main)":"34.6°","Reference size":"6.36 x 6.36 x 4.64 mm at 1.52 ct in diamond","Volume":"86.34 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.186° of the 3D model (average 0.137°); girdle facets within 0.226°","Index gear":"96","Symmetry":"4-fold symmetry","Tiers":"4 crown, 6 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":72,"fire":62,"scintillation":66,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":71,"fire":93,"scintillation":66,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest fire"]},"cubic-zirconia":{"brilliance":74,"fire":81,"scintillation":66,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":[]},"ruby":{"brilliance":76,"fire":25,"scintillation":66,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":76,"fire":25,"scintillation":66,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":57,"fire":20,"scintillation":66,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":51,"fire":20,"scintillation":66,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.52 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.39 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.50 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.73 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.73 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"97%","weight_at_reference_size":"1.17 ct","verdict":"Minor windowing"},"amethyst":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"1.14 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Radiant Square Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/50f6d654-8433-4161-b340-43321988b43c","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Radiant Square Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/fd3a043b-495d-4a91-94e7-78f2bc740eb3","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Radiant Square Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 49 planar facets."},{"question":"Is there a faceting diagram for the Radiant Square Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (41 + 8 girdles = 49 facets, 96 index, 4-fold symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Radiant Square Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, the whole pavilion reflects head-on light; in Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 34.6°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for diamond, moissanite, cubic zirconia, ruby, sapphire, emerald, amethyst."},{"question":"How accurate is the Radiant Square Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.186° of the 3D model (average 0.137°); girdle facets within 0.226°. The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Radiant Square Cut model, and what does it weigh?","answer":"The model measures 6.36 x 6.36 x 4.64 mm, which is 1.52 ct in diamond. The same size weighs 1.39 ct in moissanite, 2.50 ct in cubic zirconia, 1.73 ct in ruby, 1.73 ct in sapphire, 1.17 ct in emerald, 1.14 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Radiant Square Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=radiant-square","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/radiant-square","moissanite":"https://digitalgemology.com/gemstones/moissanite/radiant-square","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/radiant-square","ruby":"https://digitalgemology.com/gemstones/ruby/radiant-square","sapphire":"https://digitalgemology.com/gemstones/sapphire/radiant-square","emerald":"https://digitalgemology.com/gemstones/emerald/radiant-square","amethyst":"https://digitalgemology.com/gemstones/amethyst/radiant-square"}},{"slug":"square","name":"Square Cut","url":"https://digitalgemology.com/cuts/square","markdown":"https://digitalgemology.com/cuts/square.md","category":"Jewelry cuts","category_id":"jewelry","shape":"square","facets":69,"size":"7.21 x 7.21 mm","summary":"A square brilliant with a full facet set: the square counterpart of the round brilliant.","description":"Square Cut 3D model and GemCad faceting diagram: 69 facets, 7.21 x 7.21 x 4.69 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"69 planar facets (57 + 12 girdles = 69)","Outline":"Length to width 1.000","Total depth":"65.0% of width","Crown angle (main)":"35.5°","Pavilion angle (main)":"41.4°","Reference size":"7.21 x 7.21 x 4.69 mm at 1.56 ct in diamond","Volume":"88.39 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.002° of the 3D model (average under 0.001°); girdle facets within 0.098°","Index gear":"64","Symmetry":"4-fold mirror-image symmetry","Tiers":"5 crown, 4 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":85,"fire":72,"scintillation":78,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":["Highest brilliance"]},"moissanite":{"brilliance":82,"fire":91,"scintillation":78,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest fire"]},"cubic-zirconia":{"brilliance":85,"fire":83,"scintillation":78,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Highest brilliance"]},"ruby":{"brilliance":78,"fire":45,"scintillation":78,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":78,"fire":45,"scintillation":78,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":68,"fire":38,"scintillation":78,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":65,"fire":34,"scintillation":78,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.56 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.42 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.56 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.77 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.77 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.20 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"68%","weight_at_reference_size":"1.17 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Square Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/879ca486-10d4-46a9-bc7b-ec539f36b4b3","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Square Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/bf64b861-2dd3-4090-8cf9-cf1ba36b2a1f","contents":[{"format":".asc","use":"GemCad design file, 64 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Square Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 69 planar facets."},{"question":"Is there a faceting diagram for the Square Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (57 + 12 girdles = 69 facets, 64 index, 4-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Square Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, the whole pavilion reflects head-on light; in Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised."},{"question":"How accurate is the Square Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.002° of the 3D model (average under 0.001°); girdle facets within 0.098°. The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Square Cut model, and what does it weigh?","answer":"The model measures 7.21 x 7.21 x 4.69 mm, which is 1.56 ct in diamond. The same size weighs 1.42 ct in moissanite, 2.56 ct in cubic zirconia, 1.77 ct in ruby, 1.77 ct in sapphire, 1.20 ct in emerald, 1.17 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Square Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=square","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/square","moissanite":"https://digitalgemology.com/gemstones/moissanite/square","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/square","ruby":"https://digitalgemology.com/gemstones/ruby/square","sapphire":"https://digitalgemology.com/gemstones/sapphire/square","emerald":"https://digitalgemology.com/gemstones/emerald/square","amethyst":"https://digitalgemology.com/gemstones/amethyst/square"}},{"slug":"triangle","name":"Triangle Cut","url":"https://digitalgemology.com/cuts/triangle","markdown":"https://digitalgemology.com/cuts/triangle.md","category":"Jewelry cuts","category_id":"jewelry","shape":"triangular","facets":19,"size":"10.23 x 8.86 mm","summary":"A plain equilateral triangular cut: two crown tiers over three pavilion tiers, with nothing spare in the facet set.","description":"Triangle Cut 3D model and GemCad faceting diagram: 19 facets, 10.23 x 8.86 x 4.91 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"19 planar facets (16 + 3 girdles = 19)","Outline":"Length to width 1.155","Total depth":"55.4% of width","Table":"60.0% of width","Crown angle (main)":"35.3°","Pavilion angle (main)":"41.8°","Reference size":"10.23 x 8.86 x 4.91 mm at 2.00 ct in diamond","Volume":"113.64 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.004° of the 3D model (average 0.003°)","Index gear":"96","Symmetry":"3-fold symmetry","Tiers":"2 crown, 3 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":53,"fire":86,"scintillation":34,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":52,"fire":96,"scintillation":34,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest fire"]},"cubic-zirconia":{"brilliance":54,"fire":94,"scintillation":34,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest brilliance"]},"ruby":{"brilliance":33,"fire":54,"scintillation":34,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":33,"fire":54,"scintillation":34,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":27,"fire":65,"scintillation":34,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":28,"fire":61,"scintillation":34,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.00 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.83 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.30 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.55 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.51 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"Triangle Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/067c1e65-2a8c-46d7-a35b-b947713997ad","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Triangle Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/eb7ee7ef-90f9-4c80-bcb3-5f289658d26b","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Triangle Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 19 planar facets."},{"question":"Is there a faceting diagram for the Triangle Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (16 + 3 girdles = 19 facets, 96 index, 3-fold symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Triangle Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the Triangle Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.004° of the 3D model (average 0.003°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Triangle Cut model, and what does it weigh?","answer":"The model measures 10.23 x 8.86 x 4.91 mm, which is 2.00 ct in diamond. The same size weighs 1.83 ct in moissanite, 3.30 ct in cubic zirconia, 2.27 ct in ruby, 2.27 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Triangle Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=triangle","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/triangle","moissanite":"https://digitalgemology.com/gemstones/moissanite/triangle","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/triangle","ruby":"https://digitalgemology.com/gemstones/ruby/triangle","sapphire":"https://digitalgemology.com/gemstones/sapphire/triangle","emerald":"https://digitalgemology.com/gemstones/emerald/triangle","amethyst":"https://digitalgemology.com/gemstones/amethyst/triangle"}},{"slug":"trilliant","name":"Trilliant Cut","url":"https://digitalgemology.com/cuts/trilliant","markdown":"https://digitalgemology.com/cuts/trilliant.md","category":"Jewelry cuts","category_id":"jewelry","shape":"triangular","facets":72,"size":"7.61 x 7.61 mm","summary":"The trilliant: a three-sided brilliant with straight sides. Bold and graphic, it is often used as a pair of side stones either side of a centre stone.","description":"Trilliant Cut 3D model and GemCad faceting diagram: 72 facets, 7.61 x 7.61 x 4.48 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"58 + 12 girdles = 70 facets in the cutting design; the 3D model has 72 planar faces","Outline":"Length to width 1.000","Total depth":"58.9% of width","Crown angle (main)":"33.0°","Pavilion angle (main)":"39.0°","Reference size":"7.61 x 7.61 x 4.48 mm at 1.54 ct in diamond","Volume":"87.48 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.007° of the 3D model (average under 0.001°); girdle facets within 0.029°","Index gear":"96","Symmetry":"3-fold mirror-image symmetry","Tiers":"5 crown, 5 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":78,"fire":83,"scintillation":79,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":71,"fire":95,"scintillation":79,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":84,"fire":94,"scintillation":79,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall"]},"ruby":{"brilliance":86,"fire":52,"scintillation":79,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":86,"fire":52,"scintillation":79,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":68,"fire":41,"scintillation":79,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":63,"fire":34,"scintillation":79,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.54 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.41 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.54 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.75 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.75 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"77%","weight_at_reference_size":"1.19 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"77%","weight_at_reference_size":"1.16 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Trilliant Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/8cf9bf48-bd66-44ff-b7ed-7e05324314f5","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Trilliant Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/0107d982-7c9f-4008-ae0d-25f1d35efe27","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Trilliant Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 72 planar facets."},{"question":"Is there a faceting diagram for the Trilliant Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (58 + 12 girdles = 70 facets, 96 index, 3-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Trilliant Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, the whole pavilion reflects head-on light; in Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 39.0°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for moissanite, emerald, amethyst."},{"question":"How accurate is the Trilliant Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.007° of the 3D model (average under 0.001°); girdle facets within 0.029°. The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Trilliant Cut model, and what does it weigh?","answer":"The model measures 7.61 x 7.61 x 4.48 mm, which is 1.54 ct in diamond. The same size weighs 1.41 ct in moissanite, 2.54 ct in cubic zirconia, 1.75 ct in ruby, 1.75 ct in sapphire, 1.19 ct in emerald, 1.16 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Trilliant Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=trilliant","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/trilliant","moissanite":"https://digitalgemology.com/gemstones/moissanite/trilliant","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/trilliant","ruby":"https://digitalgemology.com/gemstones/ruby/trilliant","sapphire":"https://digitalgemology.com/gemstones/sapphire/trilliant","emerald":"https://digitalgemology.com/gemstones/emerald/trilliant","amethyst":"https://digitalgemology.com/gemstones/amethyst/trilliant"}},{"slug":"trillion","name":"Trillion Cut","url":"https://digitalgemology.com/cuts/trillion","markdown":"https://digitalgemology.com/cuts/trillion.md","category":"Jewelry cuts","category_id":"jewelry","shape":"triangular","facets":73,"size":"9.34 x 8.83 mm","summary":"The trillion: a three-sided brilliant whose sides bow gently outward, rounder in the hand than the straight-sided trilliant.","description":"Trillion Cut 3D model and GemCad faceting diagram: 73 facets, 9.34 x 8.83 x 4.48 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"73 planar facets (61 + 12 girdles = 73)","Outline":"Length to width 1.057","Total depth":"50.7% of width","Table":"56.6% of width","Crown angle (main)":"36.0°","Pavilion angle (main)":"31.9°","Reference size":"9.34 x 8.83 x 4.48 mm at 2.00 ct in diamond","Volume":"113.64 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.104° of the 3D model (average 0.052°); girdle facets within 0.136°","Index gear":"120","Symmetry":"3-fold symmetry","Tiers":"4 crown, 6 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":67,"fire":87,"scintillation":80,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":60,"fire":93,"scintillation":80,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":73,"fire":93,"scintillation":80,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest brilliance","Highest fire"]},"ruby":{"brilliance":72,"fire":59,"scintillation":80,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":72,"fire":59,"scintillation":80,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":63,"fire":48,"scintillation":80,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":60,"fire":44,"scintillation":80,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.00 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.83 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.30 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"2.27 ct","verdict":"Steepen the pavilion"},"sapphire":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"2.27 ct","verdict":"Steepen the pavilion"},"emerald":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"1.55 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"72%","weight_at_reference_size":"1.51 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Trillion Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/d7e9d0fc-1a1c-44fa-a3e4-2e8ef54f8e6d","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Trillion Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/d3df8563-1d93-47e4-9926-bcab55355b22","contents":[{"format":".asc","use":"GemCad design file, 120 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Trillion Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 73 planar facets."},{"question":"Is there a faceting diagram for the Trillion Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (61 + 12 girdles = 73 facets, 120 index, 3-fold symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Trillion Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, the whole pavilion reflects head-on light; in Ruby, Sapphire, Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 31.9°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for diamond, moissanite, cubic zirconia, ruby, sapphire, emerald, amethyst."},{"question":"How accurate is the Trillion Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.104° of the 3D model (average 0.052°); girdle facets within 0.136°. The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Trillion Cut model, and what does it weigh?","answer":"The model measures 9.34 x 8.83 x 4.48 mm, which is 2.00 ct in diamond. The same size weighs 1.83 ct in moissanite, 3.30 ct in cubic zirconia, 2.27 ct in ruby, 2.27 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Trillion Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=trillion","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/trillion","moissanite":"https://digitalgemology.com/gemstones/moissanite/trillion","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/trillion","ruby":"https://digitalgemology.com/gemstones/ruby/trillion","sapphire":"https://digitalgemology.com/gemstones/sapphire/trillion","emerald":"https://digitalgemology.com/gemstones/emerald/trillion","amethyst":"https://digitalgemology.com/gemstones/amethyst/trillion"}},{"slug":"heart","name":"Heart Cut","url":"https://digitalgemology.com/cuts/heart","markdown":"https://digitalgemology.com/cuts/heart.md","category":"Jewelry cuts","category_id":"jewelry","shape":"other","facets":114,"size":"7.02 x 6.93 mm","summary":"The heart brilliant: a pear-like brilliant with a cleft at the top that divides it into two lobes. The cleft and the symmetry of the two lobes are what make or break the shape.","description":"Heart Cut 3D model in STEP, STL, OBJ, GLB, FBX and 3DM: 114 facets, 7.02 x 6.93 x 4.63 mm, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"114 planar facets","Outline":"Length to width 1.013","Total depth":"66.8% of width","Crown angle (main)":"30.5°","Pavilion angle (main)":"46.5°","Reference size":"7.02 x 6.93 x 4.63 mm at 1.52 ct in diamond","Volume":"86.35 mm³","Files":"STEP, 3DM, STL, OBJ, FBX, GLB"},"performance":{},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.52 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.39 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.50 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"97%","weight_at_reference_size":"1.73 ct","verdict":"Minor windowing"},"sapphire":{"pavilion_reflecting_head_on_light":"97%","weight_at_reference_size":"1.73 ct","verdict":"Minor windowing"},"emerald":{"pavilion_reflecting_head_on_light":"79%","weight_at_reference_size":"1.17 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"79%","weight_at_reference_size":"1.14 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Heart Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/f2172900-50c2-4874-b381-2dbe8fbb4eca","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]}],"faq":[{"question":"What files come with the Heart Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 114 planar facets."},{"question":"Is there a faceting diagram for the Heart Cut?","answer":"The faceting design for the Heart Cut is in preparation and will contain a GemCad file, a tier table and a printable diagram. The 3D files are available now."},{"question":"Does the Heart Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, the whole pavilion reflects head-on light; in Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised."},{"question":"How accurate is the Heart Cut cutting file?","answer":"The cutting file for the Heart Cut is in preparation. Every cutting file we publish is checked facet by facet against its 3D model before it goes on sale."},{"question":"How big is the Heart Cut model, and what does it weigh?","answer":"The model measures 7.02 x 6.93 x 4.63 mm, which is 1.52 ct in diamond. The same size weighs 1.39 ct in moissanite, 2.50 ct in cubic zirconia, 1.73 ct in ruby, 1.73 ct in sapphire, 1.17 ct in emerald, 1.14 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Heart Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=heart","gemstone_pages":{}},{"slug":"hexagon","name":"Hexagon Cut","url":"https://digitalgemology.com/cuts/hexagon","markdown":"https://digitalgemology.com/cuts/hexagon.md","category":"Jewelry cuts","category_id":"jewelry","shape":"other","facets":37,"size":"7.93 x 6.87 mm","summary":"A six-sided outline with a step-cut crown over a tiered pavilion. Geometric and modern, it tiles well in clusters and bands.","description":"Hexagon Cut 3D model and GemCad faceting diagram: 37 facets, 7.93 x 6.87 x 4.19 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"37 planar facets (31 + 6 girdles = 37)","Outline":"Length to width 1.155","Total depth":"61.0% of width","Crown angle (main)":"40.0°","Pavilion angle (main)":"29.3°","Reference size":"7.93 x 6.87 x 4.19 mm at 1.52 ct in diamond","Volume":"86.35 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.003° of the 3D model (average 0.002°)","Index gear":"96","Symmetry":"6-fold mirror-image symmetry","Tiers":"2 crown, 3 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":58,"fire":85,"scintillation":56,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":57,"fire":97,"scintillation":56,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest fire"]},"cubic-zirconia":{"brilliance":64,"fire":84,"scintillation":56,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Highest brilliance"]},"ruby":{"brilliance":64,"fire":45,"scintillation":56,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":64,"fire":45,"scintillation":56,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":52,"fire":41,"scintillation":56,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":49,"fire":39,"scintillation":56,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.52 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.39 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.50 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"1.73 ct","verdict":"Steepen the pavilion"},"sapphire":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"1.73 ct","verdict":"Steepen the pavilion"},"emerald":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"1.17 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"1.14 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Hexagon Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/bc08dd3e-b7ff-4247-92a3-6631aa338050","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Hexagon Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/f0aadab4-ae84-471d-b091-255e3a8a531f","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Hexagon Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 37 planar facets."},{"question":"Is there a faceting diagram for the Hexagon Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (31 + 6 girdles = 37 facets, 96 index, 6-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Hexagon Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, the whole pavilion reflects head-on light; in Ruby, Sapphire, Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 29.3°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for diamond, moissanite, cubic zirconia, ruby, sapphire, emerald, amethyst."},{"question":"How accurate is the Hexagon Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.003° of the 3D model (average 0.002°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Hexagon Cut model, and what does it weigh?","answer":"The model measures 7.93 x 6.87 x 4.19 mm, which is 1.52 ct in diamond. The same size weighs 1.39 ct in moissanite, 2.50 ct in cubic zirconia, 1.73 ct in ruby, 1.73 ct in sapphire, 1.17 ct in emerald, 1.14 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Hexagon Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=hexagon","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/hexagon","moissanite":"https://digitalgemology.com/gemstones/moissanite/hexagon","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/hexagon","ruby":"https://digitalgemology.com/gemstones/ruby/hexagon","sapphire":"https://digitalgemology.com/gemstones/sapphire/hexagon","emerald":"https://digitalgemology.com/gemstones/emerald/hexagon","amethyst":"https://digitalgemology.com/gemstones/amethyst/hexagon"}},{"slug":"octagon","name":"Octagon Cut","url":"https://digitalgemology.com/cuts/octagon","markdown":"https://digitalgemology.com/cuts/octagon.md","category":"Jewelry cuts","category_id":"jewelry","shape":"other","facets":49,"size":"7.64 x 7.64 mm","summary":"An eight-sided cut carrying the same tier profile as the hexagon: a stepped crown over a three-tier pavilion.","description":"Octagon Cut 3D model and GemCad faceting diagram: 49 facets, 7.64 x 7.64 x 4.66 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"49 planar facets (41 + 8 girdles = 49)","Outline":"Length to width 1.000","Total depth":"61.0% of width","Table":"60.0% of width","Crown angle (main)":"39.8°","Pavilion angle (main)":"29.3°","Reference size":"7.64 x 7.64 x 4.66 mm at 2.00 ct in diamond","Volume":"113.64 mm³","Cutting file accuracy":"Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°)","Index gear":"96","Symmetry":"8-fold mirror-image symmetry","Tiers":"2 crown, 3 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":71,"fire":76,"scintillation":66,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":67,"fire":94,"scintillation":66,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest fire"]},"cubic-zirconia":{"brilliance":76,"fire":80,"scintillation":66,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":[]},"ruby":{"brilliance":78,"fire":33,"scintillation":66,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":78,"fire":33,"scintillation":66,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":69,"fire":34,"scintillation":66,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":64,"fire":28,"scintillation":66,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.00 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.83 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.30 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"2.27 ct","verdict":"Steepen the pavilion"},"sapphire":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"2.27 ct","verdict":"Steepen the pavilion"},"emerald":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"1.55 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"89%","weight_at_reference_size":"1.51 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Octagon Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/26baac35-16bd-4143-97ba-9eeb7fd4da11","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Octagon Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/390b595d-894b-4e34-be35-57f44d569591","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Octagon Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 49 planar facets."},{"question":"Is there a faceting diagram for the Octagon Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (41 + 8 girdles = 49 facets, 96 index, 8-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Octagon Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, the whole pavilion reflects head-on light; in Ruby, Sapphire, Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 29.3°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for diamond, moissanite, cubic zirconia, ruby, sapphire, emerald, amethyst."},{"question":"How accurate is the Octagon Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Octagon Cut model, and what does it weigh?","answer":"The model measures 7.64 x 7.64 x 4.66 mm, which is 2.00 ct in diamond. The same size weighs 1.83 ct in moissanite, 3.30 ct in cubic zirconia, 2.27 ct in ruby, 2.27 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Octagon Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=octagon","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/octagon","moissanite":"https://digitalgemology.com/gemstones/moissanite/octagon","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/octagon","ruby":"https://digitalgemology.com/gemstones/ruby/octagon","sapphire":"https://digitalgemology.com/gemstones/sapphire/octagon","emerald":"https://digitalgemology.com/gemstones/emerald/octagon","amethyst":"https://digitalgemology.com/gemstones/amethyst/octagon"}},{"slug":"portuguese-birds-nest","name":"Portuguese Bird's Nest Cut","url":"https://digitalgemology.com/cuts/portuguese-birds-nest","markdown":"https://digitalgemology.com/cuts/portuguese-birds-nest.md","category":"Jewelry cuts","category_id":"jewelry","shape":"other","facets":177,"size":"7.90 x 7.90 mm","summary":"The traditional Portuguese cut: sixteen-fold, with five crown tiers and five pavilion tiers, each offset half an index step from the one above so the facets interlock into a woven 'bird's nest'.","description":"Portuguese Bird's Nest Cut 3D model and GemCad faceting diagram: 177 facets, 7.90 x 7.90 x 4.99 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Jewelry cuts","Facets":"177 planar facets (161 + 16 girdles = 177)","Outline":"Length to width 1.000","Total depth":"63.1% of width","Table":"48.9% of width","Crown angle (main)":"26.0°","Pavilion angle (main)":"38.0°","Reference size":"7.90 x 7.90 x 4.99 mm at 2.00 ct in diamond","Volume":"113.64 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.001° of the 3D model (average under 0.001°)","Index gear":"96","Symmetry":"16-fold mirror-image symmetry","Tiers":"5 crown, 5 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":85,"fire":65,"scintillation":98,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":["Highest brilliance"]},"moissanite":{"brilliance":82,"fire":95,"scintillation":98,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest fire"]},"cubic-zirconia":{"brilliance":83,"fire":79,"scintillation":98,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":[]},"ruby":{"brilliance":69,"fire":16,"scintillation":98,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":69,"fire":16,"scintillation":98,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":42,"fire":2,"scintillation":98,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":37,"fire":1,"scintillation":98,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.00 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.83 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.30 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"78%","weight_at_reference_size":"1.55 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"78%","weight_at_reference_size":"1.51 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"Portuguese Bird's Nest Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/260cf8a0-6a47-4ff7-91e0-e41657dd7730","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Portuguese Bird's Nest Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/57a8bbc7-5d29-4910-9a85-9c0656d946a0","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Portuguese Bird's Nest Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 177 planar facets."},{"question":"Is there a faceting diagram for the Portuguese Bird's Nest Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (161 + 16 girdles = 177 facets, 96 index, 16-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Portuguese Bird's Nest Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, the whole pavilion reflects head-on light; in Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 38.0°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for diamond, moissanite, cubic zirconia, emerald, amethyst."},{"question":"How accurate is the Portuguese Bird's Nest Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.001° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Portuguese Bird's Nest Cut model, and what does it weigh?","answer":"The model measures 7.90 x 7.90 x 4.99 mm, which is 2.00 ct in diamond. The same size weighs 1.83 ct in moissanite, 3.30 ct in cubic zirconia, 2.27 ct in ruby, 2.27 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Portuguese Bird's Nest Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=portuguese-birds-nest","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/portuguese-birds-nest","moissanite":"https://digitalgemology.com/gemstones/moissanite/portuguese-birds-nest","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/portuguese-birds-nest","ruby":"https://digitalgemology.com/gemstones/ruby/portuguese-birds-nest","sapphire":"https://digitalgemology.com/gemstones/sapphire/portuguese-birds-nest","emerald":"https://digitalgemology.com/gemstones/emerald/portuguese-birds-nest","amethyst":"https://digitalgemology.com/gemstones/amethyst/portuguese-birds-nest"}},{"slug":"old-single","name":"Old Single Cut","url":"https://digitalgemology.com/cuts/old-single","markdown":"https://digitalgemology.com/cuts/old-single.md","category":"Historic cuts","category_id":"historic","shape":"round","facets":26,"size":"8.05 x 8.05 mm","summary":"The single cut, or eight cut: an octahedron with the top sawn off for a table and the corners bevelled to a regular octagon. Every crown facet is congruent and so is every pavilion facet, so the cut has exactly one crown angle and one pavilion angle.","description":"Old Single Cut 3D model and GemCad faceting diagram: 26 facets, 8.05 x 8.05 x 5.43 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Historic cuts","Facets":"26 planar facets (18 + 8 girdles = 26)","Outline":"Length to width 1.000","Total depth":"67.5% of width","Table":"57.5% of width","Crown angle (main)":"40.0°","Pavilion angle (main)":"48.5°","Reference size":"8.05 x 8.05 x 5.43 mm at 2.00 ct in diamond","Volume":"113.64 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.001° of the 3D model (average under 0.001°)","Index gear":"96","Symmetry":"8-fold mirror-image symmetry","Tiers":"1 crown, 1 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":72,"fire":84,"scintillation":44,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":77,"fire":99,"scintillation":44,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest brilliance","Highest fire"]},"cubic-zirconia":{"brilliance":65,"fire":83,"scintillation":44,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":[]},"ruby":{"brilliance":36,"fire":9,"scintillation":44,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":36,"fire":9,"scintillation":44,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":17,"fire":32,"scintillation":44,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":15,"fire":38,"scintillation":44,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"2.00 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"1.83 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"3.30 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"1.55 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"1.51 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"Old Single Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/3676049d-d816-4345-abd1-6b493531442a","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Old Single Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/8370cbbe-94b3-4fca-9136-d3396779812e","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Old Single Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 26 planar facets."},{"question":"Is there a faceting diagram for the Old Single Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (18 + 8 girdles = 26 facets, 96 index, 8-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Old Single Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the Old Single Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.001° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Old Single Cut model, and what does it weigh?","answer":"The model measures 8.05 x 8.05 x 5.43 mm, which is 2.00 ct in diamond. The same size weighs 1.83 ct in moissanite, 3.30 ct in cubic zirconia, 2.27 ct in ruby, 2.27 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Old Single Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=old-single","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/old-single","moissanite":"https://digitalgemology.com/gemstones/moissanite/old-single","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/old-single","ruby":"https://digitalgemology.com/gemstones/ruby/old-single","sapphire":"https://digitalgemology.com/gemstones/sapphire/old-single","emerald":"https://digitalgemology.com/gemstones/emerald/old-single","amethyst":"https://digitalgemology.com/gemstones/amethyst/old-single"}},{"slug":"mazarin","name":"Mazarin Cut","url":"https://digitalgemology.com/cuts/mazarin","markdown":"https://digitalgemology.com/cuts/mazarin.md","category":"Historic cuts","category_id":"historic","shape":"square","facets":42,"size":"7.46 x 7.46 mm","summary":"The Mazarin, or double cut, of the mid-1600s: the first cut to be called a brilliant. Sixteen facets sit above the girdle and sixteen below, on a cushion outline with an octagonal table and a wide, open culet.","description":"Mazarin Cut 3D model and GemCad faceting diagram: 42 facets, 7.46 x 7.46 x 5.14 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Historic cuts","Facets":"42 planar facets (34 + 8 girdles = 42)","Outline":"Length to width 1.000","Total depth":"68.8% of width","Table":"57.5% of width","Crown angle (main)":"31.4°","Pavilion angle (main)":"44.3°","Reference size":"7.46 x 7.46 x 5.14 mm at 2.00 ct in diamond","Volume":"113.64 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.003° of the 3D model (average under 0.001°)","Index gear":"96","Symmetry":"4-fold mirror-image symmetry","Tiers":"3 crown, 3 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":65,"fire":63,"scintillation":61,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":["Highest brilliance"]},"moissanite":{"brilliance":61,"fire":88,"scintillation":61,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest fire"]},"cubic-zirconia":{"brilliance":62,"fire":77,"scintillation":61,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":[]},"ruby":{"brilliance":58,"fire":40,"scintillation":61,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":58,"fire":40,"scintillation":61,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":46,"fire":31,"scintillation":61,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":43,"fire":28,"scintillation":61,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"2.00 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"1.83 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"3.30 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"1.55 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"1.51 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"Mazarin Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/d953d04c-a275-4d13-a560-1daddbb50fbd","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Mazarin Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/8e3dd23a-acd4-49f1-bf56-152e6d8b0499","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Mazarin Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 42 planar facets."},{"question":"Is there a faceting diagram for the Mazarin Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (34 + 8 girdles = 42 facets, 96 index, 4-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Mazarin Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the Mazarin Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.003° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Mazarin Cut model, and what does it weigh?","answer":"The model measures 7.46 x 7.46 x 5.14 mm, which is 2.00 ct in diamond. The same size weighs 1.83 ct in moissanite, 3.30 ct in cubic zirconia, 2.27 ct in ruby, 2.27 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Mazarin Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=mazarin","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/mazarin","moissanite":"https://digitalgemology.com/gemstones/moissanite/mazarin","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/mazarin","ruby":"https://digitalgemology.com/gemstones/ruby/mazarin","sapphire":"https://digitalgemology.com/gemstones/sapphire/mazarin","emerald":"https://digitalgemology.com/gemstones/emerald/mazarin","amethyst":"https://digitalgemology.com/gemstones/amethyst/mazarin"}},{"slug":"peruzzi","name":"Peruzzi Cut","url":"https://digitalgemology.com/cuts/peruzzi","markdown":"https://digitalgemology.com/cuts/peruzzi.md","category":"Historic cuts","category_id":"historic","shape":"square","facets":74,"size":"7.47 x 7.47 mm","summary":"The Peruzzi, or triple cut, of the late 1600s: the point at which the modern facet plan arrives. The crown divides into 8 bezels, 8 stars and 16 upper halves, mirrored below the girdle, for 58 facets in all.","description":"Peruzzi Cut 3D model and GemCad faceting diagram: 74 facets, 7.47 x 7.47 x 5.17 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Historic cuts","Facets":"74 planar facets (58 + 16 girdles = 74)","Outline":"Length to width 1.000","Total depth":"69.1% of width","Table":"56.8% of width","Crown angle (main)":"46.0°","Pavilion angle (main)":"46.2°","Reference size":"7.47 x 7.47 x 5.17 mm at 2.00 ct in diamond","Volume":"113.64 mm³","Cutting file accuracy":"Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°)","Index gear":"96","Symmetry":"4-fold mirror-image symmetry","Tiers":"5 crown, 4 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":75,"fire":68,"scintillation":81,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":["Highest brilliance"]},"moissanite":{"brilliance":71,"fire":94,"scintillation":81,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest fire"]},"cubic-zirconia":{"brilliance":67,"fire":79,"scintillation":81,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":[]},"ruby":{"brilliance":46,"fire":22,"scintillation":81,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":46,"fire":22,"scintillation":81,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":30,"fire":15,"scintillation":81,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":26,"fire":13,"scintillation":81,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"2.00 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"1.83 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"3.30 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"1.55 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"99%","weight_at_reference_size":"1.51 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"Peruzzi Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/ba27c393-fbda-46b4-89aa-d625fae47b81","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Peruzzi Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/034782ea-d041-4d5a-ad57-4bf7e75e37d7","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Peruzzi Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 74 planar facets."},{"question":"Is there a faceting diagram for the Peruzzi Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (58 + 16 girdles = 74 facets, 96 index, 4-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Peruzzi Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the Peruzzi Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Peruzzi Cut model, and what does it weigh?","answer":"The model measures 7.47 x 7.47 x 5.17 mm, which is 2.00 ct in diamond. The same size weighs 1.83 ct in moissanite, 3.30 ct in cubic zirconia, 2.27 ct in ruby, 2.27 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Peruzzi Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=peruzzi","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/peruzzi","moissanite":"https://digitalgemology.com/gemstones/moissanite/peruzzi","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/peruzzi","ruby":"https://digitalgemology.com/gemstones/ruby/peruzzi","sapphire":"https://digitalgemology.com/gemstones/sapphire/peruzzi","emerald":"https://digitalgemology.com/gemstones/emerald/peruzzi","amethyst":"https://digitalgemology.com/gemstones/amethyst/peruzzi"}},{"slug":"old-mine","name":"Old Mine Cut","url":"https://digitalgemology.com/cuts/old-mine","markdown":"https://digitalgemology.com/cuts/old-mine.md","category":"Historic cuts","category_id":"historic","shape":"square","facets":74,"size":"7.69 x 7.69 mm","summary":"The old mine cut of the 1700s and 1800s: the Peruzzi's 58 facets made more uniform, on a rounder cushion outline. The table is wide and the pavilion steep, which gives an old mine cut its characteristic dark centre and chunky flashes.","description":"Old Mine Cut 3D model and GemCad faceting diagram: 74 facets, 7.69 x 7.69 x 5.05 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Historic cuts","Facets":"74 planar facets (58 + 16 girdles = 74)","Outline":"Length to width 1.000","Total depth":"65.6% of width","Table":"60.3% of width","Crown angle (main)":"43.0°","Pavilion angle (main)":"44.4°","Reference size":"7.69 x 7.69 x 5.05 mm at 2.00 ct in diamond","Volume":"113.64 mm³","Cutting file accuracy":"Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°)","Index gear":"96","Symmetry":"4-fold mirror-image symmetry","Tiers":"5 crown, 4 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":59,"fire":72,"scintillation":81,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":60,"fire":85,"scintillation":81,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest fire"]},"cubic-zirconia":{"brilliance":64,"fire":80,"scintillation":81,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Highest brilliance"]},"ruby":{"brilliance":50,"fire":36,"scintillation":81,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":50,"fire":36,"scintillation":81,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":40,"fire":25,"scintillation":81,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":38,"fire":22,"scintillation":81,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.00 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.83 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.30 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.55 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.51 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"Old Mine Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/5b3b75f2-db63-4e1c-8acc-ed119e91984a","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Old Mine Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/54ae00b8-0467-47be-a84f-354652bd5c37","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Old Mine Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 74 planar facets."},{"question":"Is there a faceting diagram for the Old Mine Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (58 + 16 girdles = 74 facets, 96 index, 4-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Old Mine Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the Old Mine Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Old Mine Cut model, and what does it weigh?","answer":"The model measures 7.69 x 7.69 x 5.05 mm, which is 2.00 ct in diamond. The same size weighs 1.83 ct in moissanite, 3.30 ct in cubic zirconia, 2.27 ct in ruby, 2.27 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Old Mine Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=old-mine","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/old-mine","moissanite":"https://digitalgemology.com/gemstones/moissanite/old-mine","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/old-mine","ruby":"https://digitalgemology.com/gemstones/ruby/old-mine","sapphire":"https://digitalgemology.com/gemstones/sapphire/old-mine","emerald":"https://digitalgemology.com/gemstones/emerald/old-mine","amethyst":"https://digitalgemology.com/gemstones/amethyst/old-mine"}},{"slug":"old-european","name":"Old European Cut","url":"https://digitalgemology.com/cuts/old-european","markdown":"https://digitalgemology.com/cuts/old-european.md","category":"Historic cuts","category_id":"historic","shape":"round","facets":74,"size":"7.96 x 7.96 mm","summary":"The old European cut, from the 1870s onward: the old mine cut's 58 facets on a circular outline, made possible once bruting became mechanical. It is thinner than the cushion-shaped cuts before it and carries a smaller table.","description":"Old European Cut 3D model and GemCad faceting diagram: 74 facets, 7.96 x 7.96 x 5.15 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Historic cuts","Facets":"74 planar facets (58 + 16 girdles = 74)","Outline":"Length to width 1.000","Total depth":"64.7% of width","Table":"45.0% of width","Crown angle (main)":"35.0°","Pavilion angle (main)":"41.5°","Reference size":"7.96 x 7.96 x 5.15 mm at 2.00 ct in diamond","Volume":"113.64 mm³","Cutting file accuracy":"Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°)","Index gear":"96","Symmetry":"8-fold mirror-image symmetry","Tiers":"3 crown, 2 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":90,"fire":74,"scintillation":81,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":79,"fire":95,"scintillation":81,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":92,"fire":84,"scintillation":81,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest brilliance"]},"ruby":{"brilliance":78,"fire":39,"scintillation":81,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":78,"fire":39,"scintillation":81,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":64,"fire":42,"scintillation":81,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":59,"fire":37,"scintillation":81,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.00 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.83 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.30 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.55 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.51 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"Old European Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/f62fe466-3b65-4438-afae-f96f0df06c1e","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Old European Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/19f2828c-f3b0-4ed8-9631-4d28774a05e5","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Old European Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 74 planar facets."},{"question":"Is there a faceting diagram for the Old European Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (58 + 16 girdles = 74 facets, 96 index, 8-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Old European Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the Old European Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Old European Cut model, and what does it weigh?","answer":"The model measures 7.96 x 7.96 x 5.15 mm, which is 2.00 ct in diamond. The same size weighs 1.83 ct in moissanite, 3.30 ct in cubic zirconia, 2.27 ct in ruby, 2.27 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Old European Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=old-european","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/old-european","moissanite":"https://digitalgemology.com/gemstones/moissanite/old-european","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/old-european","ruby":"https://digitalgemology.com/gemstones/ruby/old-european","sapphire":"https://digitalgemology.com/gemstones/sapphire/old-european","emerald":"https://digitalgemology.com/gemstones/emerald/old-european","amethyst":"https://digitalgemology.com/gemstones/amethyst/old-european"}},{"slug":"t57-round-brilliant","name":"T57 Round Brilliant Cut","url":"https://digitalgemology.com/cuts/t57-round-brilliant","markdown":"https://digitalgemology.com/cuts/t57-round-brilliant.md","category":"Historic cuts","category_id":"historic","shape":"round","facets":57,"size":"8.15 x 8.15 mm","summary":"The 57-facet round brilliant with a knife-edge girdle, cut to the proportions Marcel Tolkowsky published in Diamond Design in 1919. Nothing is added to the facet plan: table, 8 stars, 8 bezels, 16 upper halves, 8 pavilion mains and 16 lower halves.","description":"T57 Round Brilliant Cut 3D model and GemCad faceting diagram: 57 facets, 8.15 x 8.15 x 4.83 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"Historic cuts","Facets":"57 planar facets","Outline":"Length to width 1.000","Total depth":"59.2% of width","Crown angle (main)":"34.5°","Pavilion angle (main)":"40.8°","Reference size":"8.15 x 8.15 x 4.83 mm at 1.81 ct in diamond","Volume":"102.78 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.030° of the 3D model (average 0.013°)","Index gear":"96","Symmetry":"8-fold mirror-image symmetry","Tiers":"3 crown, 2 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":92,"fire":79,"scintillation":72,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":85,"fire":98,"scintillation":72,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":98,"fire":87,"scintillation":72,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest brilliance"]},"ruby":{"brilliance":94,"fire":39,"scintillation":72,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":94,"fire":39,"scintillation":72,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":78,"fire":40,"scintillation":72,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":71,"fire":37,"scintillation":72,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.81 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.65 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.98 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.06 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.06 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.40 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.36 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"T57 Round Brilliant Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/6818fad8-a74d-4c41-80a7-dfc92d1f6b11","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"T57 Round Brilliant Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/ac539570-4805-4645-af3f-8cf47ba6b593","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the T57 Round Brilliant Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 57 planar facets."},{"question":"Is there a faceting diagram for the T57 Round Brilliant Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (57 facets, 96 index, 8-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the T57 Round Brilliant Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the T57 Round Brilliant Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.030° of the 3D model (average 0.013°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the T57 Round Brilliant Cut model, and what does it weigh?","answer":"The model measures 8.15 x 8.15 x 4.83 mm, which is 1.81 ct in diamond. The same size weighs 1.65 ct in moissanite, 2.98 ct in cubic zirconia, 2.06 ct in ruby, 2.06 ct in sapphire, 1.40 ct in emerald, 1.36 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the T57 Round Brilliant Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=t57-round-brilliant","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/t57-round-brilliant","moissanite":"https://digitalgemology.com/gemstones/moissanite/t57-round-brilliant","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/t57-round-brilliant","ruby":"https://digitalgemology.com/gemstones/ruby/t57-round-brilliant","sapphire":"https://digitalgemology.com/gemstones/sapphire/t57-round-brilliant","emerald":"https://digitalgemology.com/gemstones/emerald/t57-round-brilliant","amethyst":"https://digitalgemology.com/gemstones/amethyst/t57-round-brilliant"}},{"slug":"dg-m5","name":"DG-M5 Cut","url":"https://digitalgemology.com/cuts/dg-m5","markdown":"https://digitalgemology.com/cuts/dg-m5.md","category":"House cuts","category_id":"house","shape":"round","facets":85,"size":"8.15 x 8.15 mm","summary":"DG-M5 is a round brilliant drawn for moissanite, on a twelve-fold plan rather than the classic eight. Twenty-four crown mains and twelve stars ring the table, and a single tier of twenty-four pavilion mains runs from the girdle to a pointed culet.","description":"DG-M5 Cut 3D model and GemCad faceting diagram: 85 facets, 8.15 x 8.15 x 4.94 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"House cuts","Facets":"85 planar facets (61 + 24 girdles = 85)","Outline":"Length to width 1.000","Total depth":"60.6% of width","Crown angle (main)":"32.0°","Pavilion angle (main)":"41.5°","Reference size":"8.15 x 8.15 x 4.94 mm at 1.94 ct in diamond","Volume":"110.09 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.004° of the 3D model (average 0.003°)","Index gear":"96","Symmetry":"12-fold mirror-image symmetry","Tiers":"2 crown, 1 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":97,"fire":67,"scintillation":85,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":98,"fire":100,"scintillation":85,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest fire"]},"cubic-zirconia":{"brilliance":91,"fire":73,"scintillation":85,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":[]},"ruby":{"brilliance":100,"fire":39,"scintillation":85,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":100,"fire":39,"scintillation":85,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":90,"fire":46,"scintillation":85,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":85,"fire":50,"scintillation":85,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.94 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.77 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.19 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.20 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.20 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.50 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.46 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"DG-M5 Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/54385fa7-71f5-4b7f-8677-3e9a894ce65b","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"DG-M5 Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/1cd9a8e2-be07-4ea8-9060-d31ac824756a","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the DG-M5 Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 85 planar facets."},{"question":"Is there a faceting diagram for the DG-M5 Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (61 + 24 girdles = 85 facets, 96 index, 12-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the DG-M5 Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the DG-M5 Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.004° of the 3D model (average 0.003°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the DG-M5 Cut model, and what does it weigh?","answer":"The model measures 8.15 x 8.15 x 4.94 mm, which is 1.94 ct in diamond. The same size weighs 1.77 ct in moissanite, 3.19 ct in cubic zirconia, 2.20 ct in ruby, 2.20 ct in sapphire, 1.50 ct in emerald, 1.46 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the DG-M5 Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=dg-m5","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/dg-m5","moissanite":"https://digitalgemology.com/gemstones/moissanite/dg-m5","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-m5","ruby":"https://digitalgemology.com/gemstones/ruby/dg-m5","sapphire":"https://digitalgemology.com/gemstones/sapphire/dg-m5","emerald":"https://digitalgemology.com/gemstones/emerald/dg-m5","amethyst":"https://digitalgemology.com/gemstones/amethyst/dg-m5"}},{"slug":"dg-miliano","name":"DG-Miliano Cut","url":"https://digitalgemology.com/cuts/dg-miliano","markdown":"https://digitalgemology.com/cuts/dg-miliano.md","category":"House cuts","category_id":"house","shape":"round","facets":177,"size":"8.15 x 8.15 mm","summary":"DG-Miliano is a round brilliant drawn for moissanite: eight stars, eight crown mains and sixteen upper girdle facets around the table, over a girdle of ninety-six facets.","description":"DG-Miliano Cut 3D model and GemCad faceting diagram: 177 facets, 8.15 x 8.15 x 4.92 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"House cuts","Facets":"177 planar facets (81 + 96 girdles = 177)","Outline":"Length to width 1.000","Total depth":"60.3% of width","Crown angle (main)":"32.0°","Pavilion angle (main)":"38.3°","Reference size":"8.15 x 8.15 x 4.92 mm at 2.03 ct in diamond","Volume":"115.38 mm³","Cutting file accuracy":"Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°)","Index gear":"96","Symmetry":"8-fold mirror-image symmetry","Tiers":"3 crown, 3 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":95,"fire":82,"scintillation":98,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":86,"fire":93,"scintillation":98,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":97,"fire":90,"scintillation":98,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest brilliance"]},"ruby":{"brilliance":90,"fire":35,"scintillation":98,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":90,"fire":35,"scintillation":98,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":67,"fire":34,"scintillation":98,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":60,"fire":28,"scintillation":98,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.03 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.86 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.35 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.31 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.31 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"88%","weight_at_reference_size":"1.57 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"88%","weight_at_reference_size":"1.53 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"DG-Miliano Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/64f6a797-2b19-41a1-93eb-7002ff5b6ece","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"DG-Miliano Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/cc318b04-5437-4caa-b24c-db44b0a61593","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the DG-Miliano Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 177 planar facets."},{"question":"Is there a faceting diagram for the DG-Miliano Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (81 + 96 girdles = 177 facets, 96 index, 8-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the DG-Miliano Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, the whole pavilion reflects head-on light; in Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 38.3°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for diamond, moissanite, emerald, amethyst."},{"question":"How accurate is the DG-Miliano Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the DG-Miliano Cut model, and what does it weigh?","answer":"The model measures 8.15 x 8.15 x 4.92 mm, which is 2.03 ct in diamond. The same size weighs 1.86 ct in moissanite, 3.35 ct in cubic zirconia, 2.31 ct in ruby, 2.31 ct in sapphire, 1.57 ct in emerald, 1.53 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the DG-Miliano Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=dg-miliano","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/dg-miliano","moissanite":"https://digitalgemology.com/gemstones/moissanite/dg-miliano","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-miliano","ruby":"https://digitalgemology.com/gemstones/ruby/dg-miliano","sapphire":"https://digitalgemology.com/gemstones/sapphire/dg-miliano","emerald":"https://digitalgemology.com/gemstones/emerald/dg-miliano","amethyst":"https://digitalgemology.com/gemstones/amethyst/dg-miliano"}},{"slug":"dg-rafaello","name":"DG-Rafaello Cut","url":"https://digitalgemology.com/cuts/dg-rafaello","markdown":"https://digitalgemology.com/cuts/dg-rafaello.md","category":"House cuts","category_id":"house","shape":"round","facets":145,"size":"8.15 x 8.15 mm","summary":"DG-Rafaello is a twelve-fold round brilliant drawn for diamond. Its pavilion is cut in five tiers, each a little shallower than the last from the girdle down to the point, where a classic round has one main angle and a row of lower halves.","description":"DG-Rafaello Cut 3D model and GemCad faceting diagram: 145 facets, 8.15 x 8.15 x 4.81 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"House cuts","Facets":"145 planar facets (121 + 24 girdles = 145)","Outline":"Length to width 1.000","Total depth":"59.0% of width","Crown angle (main)":"33.0°","Pavilion angle (main)":"40.0°","Reference size":"8.15 x 8.15 x 4.81 mm at 1.85 ct in diamond","Volume":"105.36 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.015° of the 3D model (average under 0.001°)","Index gear":"96","Symmetry":"12-fold mirror-image symmetry","Tiers":"2 crown, 5 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":94,"fire":80,"scintillation":96,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":84,"fire":90,"scintillation":96,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":100,"fire":87,"scintillation":96,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest brilliance"]},"ruby":{"brilliance":85,"fire":25,"scintillation":96,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":85,"fire":25,"scintillation":96,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":54,"fire":28,"scintillation":96,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":45,"fire":26,"scintillation":96,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.85 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.70 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.06 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.11 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.11 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.43 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"82%","weight_at_reference_size":"1.40 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"DG-Rafaello Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/c8230206-c376-445e-95fa-4eb45712a193","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"DG-Rafaello Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/778e2716-a27b-4192-95b1-791b03b338e4","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the DG-Rafaello Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 145 planar facets."},{"question":"Is there a faceting diagram for the DG-Rafaello Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (121 + 24 girdles = 145 facets, 96 index, 12-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the DG-Rafaello Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, the whole pavilion reflects head-on light; in Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised. The pavilion mains of this design sit at 40.0°. For head-on light to reflect off both sides of the pavilion and leave through the table, a round design needs at least 40.4° in amethyst, so the mains are worth steepening for amethyst."},{"question":"How accurate is the DG-Rafaello Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.015° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the DG-Rafaello Cut model, and what does it weigh?","answer":"The model measures 8.15 x 8.15 x 4.81 mm, which is 1.85 ct in diamond. The same size weighs 1.70 ct in moissanite, 3.06 ct in cubic zirconia, 2.11 ct in ruby, 2.11 ct in sapphire, 1.43 ct in emerald, 1.40 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the DG-Rafaello Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=dg-rafaello","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/dg-rafaello","moissanite":"https://digitalgemology.com/gemstones/moissanite/dg-rafaello","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-rafaello","ruby":"https://digitalgemology.com/gemstones/ruby/dg-rafaello","sapphire":"https://digitalgemology.com/gemstones/sapphire/dg-rafaello","emerald":"https://digitalgemology.com/gemstones/emerald/dg-rafaello","amethyst":"https://digitalgemology.com/gemstones/amethyst/dg-rafaello"}},{"slug":"dg-bowtie","name":"DG-Bowtie Cut","url":"https://digitalgemology.com/cuts/dg-bowtie","markdown":"https://digitalgemology.com/cuts/dg-bowtie.md","category":"House cuts","category_id":"house","shape":"elongated","facets":87,"size":"10.65 x 5.17 mm","summary":"DG-Bowtie is the library's first marquise, a diamond design kept under its own name when the Marquise was remodelled. It is cut nearly as deep as it is wide, where the trade aims for around 60%.","description":"DG-Bowtie Cut 3D model and GemCad faceting diagram: 87 facets, 10.65 x 5.17 x 4.85 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"House cuts","Facets":"87 planar facets (67 + 20 girdles = 87)","Outline":"Length to width 2.059","Total depth":"93.8% of width","Crown angle (main)":"49.0°","Pavilion angle (main)":"42.0°","Reference size":"10.65 x 5.17 x 4.85 mm at 1.59 ct in diamond","Volume":"90.22 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.004° of the 3D model (average under 0.001°); girdle facets within 0.043°","Index gear":"64","Symmetry":"2-fold mirror-image symmetry","Tiers":"10 crown, 8 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":27,"fire":82,"scintillation":86,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":29,"fire":98,"scintillation":86,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall","Highest brilliance","Highest fire"]},"cubic-zirconia":{"brilliance":26,"fire":90,"scintillation":86,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":[]},"ruby":{"brilliance":18,"fire":57,"scintillation":86,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":18,"fire":57,"scintillation":86,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":13,"fire":70,"scintillation":86,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":12,"fire":64,"scintillation":86,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.59 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.45 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.62 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.80 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.80 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.23 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.20 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"DG-Bowtie Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/b733444a-f43f-4d55-a1db-20905f5affdc","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"DG-Bowtie Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/a03576f3-7240-4de1-b392-c6f143d6a69e","contents":[{"format":".asc","use":"GemCad design file, 64 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the DG-Bowtie Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 87 planar facets."},{"question":"Is there a faceting diagram for the DG-Bowtie Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (67 + 20 girdles = 87 facets, 64 index, 2-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the DG-Bowtie Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the DG-Bowtie Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.004° of the 3D model (average under 0.001°); girdle facets within 0.043°. The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the DG-Bowtie Cut model, and what does it weigh?","answer":"The model measures 10.65 x 5.17 x 4.85 mm, which is 1.59 ct in diamond. The same size weighs 1.45 ct in moissanite, 2.62 ct in cubic zirconia, 1.80 ct in ruby, 1.80 ct in sapphire, 1.23 ct in emerald, 1.20 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the DG-Bowtie Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=dg-bowtie","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/dg-bowtie","moissanite":"https://digitalgemology.com/gemstones/moissanite/dg-bowtie","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-bowtie","ruby":"https://digitalgemology.com/gemstones/ruby/dg-bowtie","sapphire":"https://digitalgemology.com/gemstones/sapphire/dg-bowtie","emerald":"https://digitalgemology.com/gemstones/emerald/dg-bowtie","amethyst":"https://digitalgemology.com/gemstones/amethyst/dg-bowtie"}},{"slug":"dg-elongated-hexagon","name":"DG-Elongated Hexagon Cut","url":"https://digitalgemology.com/cuts/dg-elongated-hexagon","markdown":"https://digitalgemology.com/cuts/dg-elongated-hexagon.md","category":"House cuts","category_id":"house","shape":"elongated","facets":32,"size":"11.44 x 6.73 mm","summary":"An elongated hexagon with square points, step cut the same on both faces: two steps either side of a six-facet girdle, a table in front and a flat of the same size behind. Drawn for emerald.","description":"DG-Elongated Hexagon Cut 3D model and GemCad faceting diagram: 32 facets, 11.44 x 6.73 x 3.05 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"House cuts","Facets":"32 planar facets (26 + 6 girdles = 32)","Outline":"Length to width 1.700","Total depth":"45.3% of width","Table":"50.0% of width","Crown angle (main)":"36.0°","Pavilion angle (main)":"36.0°","Reference size":"11.44 x 6.73 x 3.05 mm at 2.00 ct in diamond","Volume":"113.64 mm³","Cutting file accuracy":"Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°)","Index gear":"96","Symmetry":"2-fold mirror-image symmetry","Tiers":"4 crown, 4 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":12,"fire":97,"scintillation":51,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":["Highest fire"]},"moissanite":{"brilliance":20,"fire":93,"scintillation":51,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Best overall"]},"cubic-zirconia":{"brilliance":16,"fire":97,"scintillation":51,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest fire"]},"ruby":{"brilliance":27,"fire":72,"scintillation":51,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"sapphire":{"brilliance":27,"fire":72,"scintillation":51,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":["Highest brilliance"]},"emerald":{"brilliance":25,"fire":69,"scintillation":51,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":25,"fire":64,"scintillation":51,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.00 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.83 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.30 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"24%","weight_at_reference_size":"1.55 ct","verdict":"Steepen the pavilion"},"amethyst":{"pavilion_reflecting_head_on_light":"24%","weight_at_reference_size":"1.51 ct","verdict":"Steepen the pavilion"}},"products":[{"type":"3d_files","name":"DG-Elongated Hexagon Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/6e85a867-09c4-4537-8dfc-a52e955e13ac","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"DG-Elongated Hexagon Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/8a06e2a3-b352-4f8f-8ddc-52e4b7a4b4ae","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the DG-Elongated Hexagon Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 32 planar facets."},{"question":"Is there a faceting diagram for the DG-Elongated Hexagon Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (26 + 6 girdles = 32 facets, 96 index, 2-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the DG-Elongated Hexagon Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, the whole pavilion reflects head-on light; in Emerald, Amethyst, part of the pavilion lets light out of the back, so a steeper pavilion is advised."},{"question":"How accurate is the DG-Elongated Hexagon Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the DG-Elongated Hexagon Cut model, and what does it weigh?","answer":"The model measures 11.44 x 6.73 x 3.05 mm, which is 2.00 ct in diamond. The same size weighs 1.83 ct in moissanite, 3.30 ct in cubic zirconia, 2.27 ct in ruby, 2.27 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the DG-Elongated Hexagon Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=dg-elongated-hexagon","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/dg-elongated-hexagon","moissanite":"https://digitalgemology.com/gemstones/moissanite/dg-elongated-hexagon","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-elongated-hexagon","ruby":"https://digitalgemology.com/gemstones/ruby/dg-elongated-hexagon","sapphire":"https://digitalgemology.com/gemstones/sapphire/dg-elongated-hexagon","emerald":"https://digitalgemology.com/gemstones/emerald/dg-elongated-hexagon","amethyst":"https://digitalgemology.com/gemstones/amethyst/dg-elongated-hexagon"}},{"slug":"dg-cabochon","name":"DG-Cabochon Cut","url":"https://digitalgemology.com/cuts/dg-cabochon","markdown":"https://digitalgemology.com/cuts/dg-cabochon.md","category":"House cuts","category_id":"house","shape":"other","facets":76,"size":"6.26 x 5.96 mm","summary":"A faceted cabochon: seventy-five triangular facets on a five-fold pattern, rising from a flat pentagonal base to a point. It is widest a little below the middle, and the crown and pavilion triangles meet in a zig-zag at the widest ring, with no girdle band. Drawn for ruby.","description":"DG-Cabochon Cut 3D model and GemCad faceting diagram: 76 facets, 6.26 x 5.96 x 6.73 mm. Six formats.","specifications":{"Category":"House cuts","Facets":"76 planar facets","Outline":"Length to width 1.051","Total depth":"112.9% of width","Table":"None: the top closes to a point, like a cabochon's dome","Crown angle (main)":"58.0°","Pavilion angle (main)":"69.5°","Reference size":"6.26 x 5.96 x 6.73 mm at 2.00 ct in diamond","Volume":"113.64 mm³","Cutting file accuracy":"Every crown and pavilion facet within 0.004° of the 3D model (average under 0.001°)","Index gear":"120","Symmetry":"5-fold mirror-image symmetry","Tiers":"6 crown, 5 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"n/a","weight_at_reference_size":"2.00 ct","verdict":"Not measured: no table"},"moissanite":{"pavilion_reflecting_head_on_light":"n/a","weight_at_reference_size":"1.83 ct","verdict":"Not measured: no table"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"n/a","weight_at_reference_size":"3.30 ct","verdict":"Not measured: no table"},"ruby":{"pavilion_reflecting_head_on_light":"n/a","weight_at_reference_size":"2.27 ct","verdict":"Not measured: no table"},"sapphire":{"pavilion_reflecting_head_on_light":"n/a","weight_at_reference_size":"2.27 ct","verdict":"Not measured: no table"},"emerald":{"pavilion_reflecting_head_on_light":"n/a","weight_at_reference_size":"1.55 ct","verdict":"Not measured: no table"},"amethyst":{"pavilion_reflecting_head_on_light":"n/a","weight_at_reference_size":"1.51 ct","verdict":"Not measured: no table"}},"products":[{"type":"3d_files","name":"DG-Cabochon Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/5b8a47ea-a607-42fd-90b9-f173b98744cd","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"DG-Cabochon Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/203d3a68-5eb3-49e2-a73d-f5046968af8f","contents":[{"format":".asc","use":"GemCad design file, 120 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the DG-Cabochon Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 76 planar facets."},{"question":"Is there a faceting diagram for the DG-Cabochon Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (76 facets, 120 index, 5-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the DG-Cabochon Cut work in sapphire, emerald or amethyst?","answer":"This stone has no table, so the head-on light measure we use for the other cuts does not apply: light enters and leaves through its steep facets rather than through a table. Its Light Return map shows how it behaves in each stone."},{"question":"How accurate is the DG-Cabochon Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within 0.004° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the DG-Cabochon Cut model, and what does it weigh?","answer":"The model measures 6.26 x 5.96 x 6.73 mm, which is 2.00 ct in diamond. The same size weighs 1.83 ct in moissanite, 3.30 ct in cubic zirconia, 2.27 ct in ruby, 2.27 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the DG-Cabochon Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=dg-cabochon","gemstone_pages":{}},{"slug":"dg-octagonal-kite","name":"DG-Octagonal Kite Cut","url":"https://digitalgemology.com/cuts/dg-octagonal-kite","markdown":"https://digitalgemology.com/cuts/dg-octagonal-kite.md","category":"House cuts","category_id":"house","shape":"other","facets":41,"size":"7.61 x 7.61 mm","summary":"An eight-fold cut with a large octagonal table. Eight kites run from the girdle corners to the table edges over eight triangles on the girdle flats, and the pavilion repeats the pattern in long kites that close to a point.","description":"DG-Octagonal Kite Cut 3D model and GemCad faceting diagram: 41 facets, 7.61 x 7.61 x 5.33 mm. Six formats, measured in 7 gemstones.","specifications":{"Category":"House cuts","Facets":"41 planar facets (33 + 8 girdles = 41)","Outline":"Length to width 1.000","Total depth":"70.0% of width","Table":"55.0% of width","Crown angle (main)":"32.0°","Pavilion angle (main)":"43.0°","Reference size":"7.61 x 7.61 x 5.33 mm at 2.00 ct in diamond","Volume":"113.64 mm³","Cutting file accuracy":"Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°)","Index gear":"96","Symmetry":"8-fold mirror-image symmetry","Tiers":"2 crown, 2 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{"diamond":{"brilliance":88,"fire":82,"scintillation":60,"t73":{"brilliance":93,"fire":78,"scintillation":80},"tags":[]},"moissanite":{"brilliance":71,"fire":95,"scintillation":60,"t73":{"brilliance":86,"fire":97,"scintillation":80},"tags":["Highest fire"]},"cubic-zirconia":{"brilliance":93,"fire":92,"scintillation":60,"t73":{"brilliance":98,"fire":87,"scintillation":80},"tags":["Best overall","Highest brilliance"]},"ruby":{"brilliance":74,"fire":34,"scintillation":60,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"sapphire":{"brilliance":74,"fire":34,"scintillation":60,"t73":{"brilliance":94,"fire":37,"scintillation":80},"tags":[]},"emerald":{"brilliance":54,"fire":40,"scintillation":60,"t73":{"brilliance":78,"fire":39,"scintillation":80},"tags":[]},"amethyst":{"brilliance":50,"fire":33,"scintillation":60,"t73":{"brilliance":72,"fire":36,"scintillation":80},"tags":[]}},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.00 ct","verdict":"Holds head-on light"},"moissanite":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.83 ct","verdict":"Holds head-on light"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"3.30 ct","verdict":"Holds head-on light"},"ruby":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"sapphire":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"2.27 ct","verdict":"Holds head-on light"},"emerald":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.55 ct","verdict":"Holds head-on light"},"amethyst":{"pavilion_reflecting_head_on_light":"100%","weight_at_reference_size":"1.51 ct","verdict":"Holds head-on light"}},"products":[{"type":"3d_files","name":"DG-Octagonal Kite Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/7f8bb426-65ee-4e34-a5ca-8afca2cfd900","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"DG-Octagonal Kite Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/25afd253-e939-428f-b41c-144509a92281","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the DG-Octagonal Kite Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 41 planar facets."},{"question":"Is there a faceting diagram for the DG-Octagonal Kite Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (33 + 8 girdles = 41 facets, 96 index, 8-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the DG-Octagonal Kite Cut work in sapphire, emerald or amethyst?","answer":"We measured the pavilion of this model against the critical angle of each stone. In Diamond, Moissanite, Cubic Zirconia, Ruby, Sapphire, Emerald, Amethyst, the whole pavilion reflects head-on light."},{"question":"How accurate is the DG-Octagonal Kite Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the DG-Octagonal Kite Cut model, and what does it weigh?","answer":"The model measures 7.61 x 7.61 x 5.33 mm, which is 2.00 ct in diamond. The same size weighs 1.83 ct in moissanite, 3.30 ct in cubic zirconia, 2.27 ct in ruby, 2.27 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the DG-Octagonal Kite Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=dg-octagonal-kite","gemstone_pages":{"diamond":"https://digitalgemology.com/gemstones/diamond/dg-octagonal-kite","moissanite":"https://digitalgemology.com/gemstones/moissanite/dg-octagonal-kite","cubic-zirconia":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-octagonal-kite","ruby":"https://digitalgemology.com/gemstones/ruby/dg-octagonal-kite","sapphire":"https://digitalgemology.com/gemstones/sapphire/dg-octagonal-kite","emerald":"https://digitalgemology.com/gemstones/emerald/dg-octagonal-kite","amethyst":"https://digitalgemology.com/gemstones/amethyst/dg-octagonal-kite"}},{"slug":"elongated-hexagonal-bipyramid","name":"Elongated Hexagonal Bipyramid Cut","url":"https://digitalgemology.com/cuts/elongated-hexagonal-bipyramid","markdown":"https://digitalgemology.com/cuts/elongated-hexagonal-bipyramid.md","category":"House cuts","category_id":"house","shape":"other","facets":30,"size":"6.03 x 5.22 mm","summary":"A hexagonal double point: six kites run from the girdle corners to each point, over six steep triangles standing on the girdle flats. It has no table and no culet, and the lower point is the longer of the two. Drawn for emerald.","description":"Elongated Hexagonal Bipyramid Cut 3D model and GemCad faceting diagram: 30 facets, 6.03 x 5.22 x 12.31 mm. Six formats.","specifications":{"Category":"House cuts","Facets":"30 planar facets (24 + 6 girdles = 30)","Outline":"Length to width 1.155","Total depth":"235.8% of width","Table":"None: the stone closes to a point at both ends","Crown angle (main)":"70.0°","Pavilion angle (main)":"66.5°","Reference size":"6.03 x 5.22 x 12.31 mm at 2.00 ct in diamond","Volume":"113.64 mm³","Cutting file accuracy":"Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°)","Index gear":"96","Symmetry":"6-fold mirror-image symmetry","Tiers":"2 crown, 2 pavilion","Files":"STEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram"},"performance":{},"head_on_light":{"diamond":{"pavilion_reflecting_head_on_light":"n/a","weight_at_reference_size":"2.00 ct","verdict":"Not measured: no table"},"moissanite":{"pavilion_reflecting_head_on_light":"n/a","weight_at_reference_size":"1.83 ct","verdict":"Not measured: no table"},"cubic-zirconia":{"pavilion_reflecting_head_on_light":"n/a","weight_at_reference_size":"3.30 ct","verdict":"Not measured: no table"},"ruby":{"pavilion_reflecting_head_on_light":"n/a","weight_at_reference_size":"2.27 ct","verdict":"Not measured: no table"},"sapphire":{"pavilion_reflecting_head_on_light":"n/a","weight_at_reference_size":"2.27 ct","verdict":"Not measured: no table"},"emerald":{"pavilion_reflecting_head_on_light":"n/a","weight_at_reference_size":"1.55 ct","verdict":"Not measured: no table"},"amethyst":{"pavilion_reflecting_head_on_light":"n/a","weight_at_reference_size":"1.51 ct","verdict":"Not measured: no table"}},"products":[{"type":"3d_files","name":"Elongated Hexagonal Bipyramid Cut 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/9dea79b3-5ce4-4b94-85f9-e3476f154d46","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]},{"type":"cutting_files","name":"Elongated Hexagonal Bipyramid Cut cutting files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/0b8569dc-9d65-44aa-9d19-b8f816b287b4","contents":[{"format":".asc","use":"GemCad design file, 96 index gear"},{"format":".csv","use":"Tier table: angles, indices and cutting order"},{"format":"Diagram","use":"Printable faceting diagram"}]}],"faq":[{"question":"What files come with the Elongated Hexagonal Bipyramid Cut 3D model?","answer":"Six formats: STEP (the exact faceted solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 30 planar facets."},{"question":"Is there a faceting diagram for the Elongated Hexagonal Bipyramid Cut?","answer":"Yes. The cutting files contain a GemCad .asc design (24 + 6 girdles = 30 facets, 96 index, 6-fold mirror-image symmetry), a tier table with angles, indices and cutting order in CSV, and a printable faceting diagram."},{"question":"Does the Elongated Hexagonal Bipyramid Cut work in sapphire, emerald or amethyst?","answer":"This stone has no table, so the head-on light measure we use for the other cuts does not apply: light enters and leaves through its steep facets rather than through a table. Its Light Return map shows how it behaves in each stone."},{"question":"How accurate is the Elongated Hexagonal Bipyramid Cut cutting file?","answer":"We check it facet by facet against the 3D model it was written from. Every crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°). The angles are the ones you set on the machine; the 3D model is the same stone you render or set."},{"question":"How big is the Elongated Hexagonal Bipyramid Cut model, and what does it weigh?","answer":"The model measures 6.03 x 5.22 x 12.31 mm, which is 2.00 ct in diamond. The same size weighs 1.83 ct in moissanite, 3.30 ct in cubic zirconia, 2.27 ct in ruby, 2.27 ct in sapphire, 1.55 ct in emerald, 1.51 ct in amethyst. Scale it uniformly to any size: weight follows the cube of the size."},{"question":"Can I 3D print or cast the Elongated Hexagonal Bipyramid Cut model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact faceted solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=elongated-hexagonal-bipyramid","gemstone_pages":{}},{"slug":"tetrahedron","name":"Tetrahedron","url":"https://digitalgemology.com/cuts/tetrahedron","markdown":"https://digitalgemology.com/cuts/tetrahedron.md","category":"Platonic solids","category_id":"platonic","shape":"solid","facets":4,"size":"10 mm circumsphere","summary":"The simplest solid that encloses a volume: four equilateral triangles, meeting three at each of four vertices. It is the only Platonic solid that is its own dual: join the centres of its four faces and you get a second tetrahedron.","description":"The tetrahedron as an exact 3D model in STEP, 3DM, STL, OBJ, FBX and GLB: 4 faces, 8.165 mm edges, 10 mm circumsphere.","specifications":{"Category":"Platonic solids","Faces":"4 equilateral triangles, all congruent","Vertices":"4, 3 faces meeting at each","Edges":"6, each 8.165 mm","Schläfli symbol":"{3,3}","Dual":"Itself: the tetrahedron is self-dual","Dihedral angle":"70.529°, the same on every edge","Size":"8.165 x 7.071 x 6.667 mm, resting on a face","Circumsphere":"10.000 mm across, through every vertex","Midsphere":"5.774 mm across, touching every edge","Insphere":"3.333 mm across, touching every face","Surface area":"115.47 mm²","Volume":"64.15 mm³","Sphere fill":"12.3% of its circumsphere","Isoperimetric quotient":"0.302 (a sphere is 1)","Weight at this size":"1.13 ct in diamond, 1.03 ct in moissanite","Orientation":"Millimetres, Y up, one face resting on the ground plane, centred on the Y axis","Files":"STEP, 3DM, STL, OBJ, FBX, GLB. 3D files only, no cutting files"},"performance":{},"head_on_light":{},"products":[{"type":"3d_files","name":"Tetrahedron 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/f5f032b8-54d4-4a8f-b0f3-f63967a287c6","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]}],"faq":[{"question":"What files come with the Tetrahedron 3D model?","answer":"Six formats: STEP (the exact solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 4 flat faces."},{"question":"Is there a cutting file for the Tetrahedron?","answer":"No. The Platonic solids are sold as 3D models only, with no faceting design, tier table or diagram."},{"question":"How big is the Tetrahedron model?","answer":"It measures 8.165 x 7.071 x 6.667 mm resting on a face, with every vertex on a sphere 10 mm across. All five Platonic solids share that sphere, so they nest and sit together at true relative size. Scale it uniformly to any size: for a 10 mm edge, scale by 1.2247."},{"question":"How is the Tetrahedron model oriented?","answer":"Y up, with one face resting on the ground plane and the centroid on the Y axis. The midpoint of one edge of the resting face lies on the +X axis, which keeps the cube square to the axes."},{"question":"Can I 3D print or cast the Tetrahedron model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=tetrahedron","gemstone_pages":{}},{"slug":"hexahedron","name":"Hexahedron","url":"https://digitalgemology.com/cuts/hexahedron","markdown":"https://digitalgemology.com/cuts/hexahedron.md","category":"Platonic solids","category_id":"platonic","shape":"solid","facets":6,"size":"10 mm circumsphere","summary":"The cube: six squares, meeting three at each of eight vertices. It is the only Platonic solid that fills space on its own, stacked with no gaps, and it is dual to the octahedron.","description":"The hexahedron (the cube) as an exact 3D model in STEP, 3DM, STL, OBJ, FBX and GLB: 6 faces, 5.774 mm edges, 10 mm circumsphere.","specifications":{"Category":"Platonic solids","Faces":"6 squares, all congruent","Vertices":"8, 3 faces meeting at each","Edges":"12, each 5.774 mm","Schläfli symbol":"{4,3}","Dual":"The octahedron","Dihedral angle":"90.000°, the same on every edge","Size":"5.774 x 5.774 x 5.774 mm, resting on a face","Circumsphere":"10.000 mm across, through every vertex","Midsphere":"8.165 mm across, touching every edge","Insphere":"5.774 mm across, touching every face","Surface area":"200.00 mm²","Volume":"192.45 mm³","Sphere fill":"36.8% of its circumsphere","Isoperimetric quotient":"0.524 (a sphere is 1)","Weight at this size":"3.39 ct in diamond, 3.10 ct in moissanite","Orientation":"Millimetres, Y up, one face resting on the ground plane, centred on the Y axis","Files":"STEP, 3DM, STL, OBJ, FBX, GLB. 3D files only, no cutting files"},"performance":{},"head_on_light":{},"products":[{"type":"3d_files","name":"Hexahedron 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/55bffa20-ed7a-48b1-97a9-7cf09352071c","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]}],"faq":[{"question":"What files come with the Hexahedron 3D model?","answer":"Six formats: STEP (the exact solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 6 flat faces."},{"question":"Is there a cutting file for the Hexahedron?","answer":"No. The Platonic solids are sold as 3D models only, with no faceting design, tier table or diagram."},{"question":"How big is the Hexahedron model?","answer":"It measures 5.774 x 5.774 x 5.774 mm resting on a face, with every vertex on a sphere 10 mm across. All five Platonic solids share that sphere, so they nest and sit together at true relative size. Scale it uniformly to any size: for a 10 mm edge, scale by 1.7321."},{"question":"How is the Hexahedron model oriented?","answer":"Y up, with one face resting on the ground plane and the centroid on the Y axis. The midpoint of one edge of the resting face lies on the +X axis, which keeps the cube square to the axes."},{"question":"Can I 3D print or cast the Hexahedron model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=hexahedron","gemstone_pages":{}},{"slug":"octahedron","name":"Octahedron","url":"https://digitalgemology.com/cuts/octahedron","markdown":"https://digitalgemology.com/cuts/octahedron.md","category":"Platonic solids","category_id":"platonic","shape":"solid","facets":8,"size":"10 mm circumsphere","summary":"Eight equilateral triangles, meeting four at each of six vertices, dual to the cube. It is the shape rough diamond most often grows in, and spinel and magnetite share the habit.","description":"The octahedron as an exact 3D model in STEP, 3DM, STL, OBJ, FBX and GLB: 8 faces, 7.071 mm edges, 10 mm circumsphere.","specifications":{"Category":"Platonic solids","Faces":"8 equilateral triangles, all congruent","Vertices":"6, 4 faces meeting at each","Edges":"12, each 7.071 mm","Schläfli symbol":"{3,4}","Dual":"The hexahedron (the cube)","Dihedral angle":"109.471°, the same on every edge","Size":"8.165 x 7.071 x 5.774 mm, resting on a face","Circumsphere":"10.000 mm across, through every vertex","Midsphere":"7.071 mm across, touching every edge","Insphere":"5.774 mm across, touching every face","Surface area":"173.21 mm²","Volume":"166.67 mm³","Sphere fill":"31.8% of its circumsphere","Isoperimetric quotient":"0.605 (a sphere is 1)","Weight at this size":"2.93 ct in diamond, 2.68 ct in moissanite","Orientation":"Millimetres, Y up, one face resting on the ground plane, centred on the Y axis","Files":"STEP, 3DM, STL, OBJ, FBX, GLB. 3D files only, no cutting files"},"performance":{},"head_on_light":{},"products":[{"type":"3d_files","name":"Octahedron 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/134deb91-1f31-4b19-a4a6-539a2a763f96","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]}],"faq":[{"question":"What files come with the Octahedron 3D model?","answer":"Six formats: STEP (the exact solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 8 flat faces."},{"question":"Is there a cutting file for the Octahedron?","answer":"No. The Platonic solids are sold as 3D models only, with no faceting design, tier table or diagram."},{"question":"How big is the Octahedron model?","answer":"It measures 8.165 x 7.071 x 5.774 mm resting on a face, with every vertex on a sphere 10 mm across. All five Platonic solids share that sphere, so they nest and sit together at true relative size. Scale it uniformly to any size: for a 10 mm edge, scale by 1.4142."},{"question":"How is the Octahedron model oriented?","answer":"Y up, with one face resting on the ground plane and the centroid on the Y axis. The midpoint of one edge of the resting face lies on the +X axis, which keeps the cube square to the axes."},{"question":"Can I 3D print or cast the Octahedron model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=octahedron","gemstone_pages":{}},{"slug":"dodecahedron","name":"Dodecahedron","url":"https://digitalgemology.com/cuts/dodecahedron","markdown":"https://digitalgemology.com/cuts/dodecahedron.md","category":"Platonic solids","category_id":"platonic","shape":"solid","facets":12,"size":"10 mm circumsphere","summary":"Twelve regular pentagons, meeting three at each of twenty vertices, dual to the icosahedron. Of the five solids it fills the most of its own circumsphere.","description":"The dodecahedron as an exact 3D model in STEP, 3DM, STL, OBJ, FBX and GLB: 12 faces, 3.568 mm edges, 10 mm circumsphere.","specifications":{"Category":"Platonic solids","Faces":"12 regular pentagons, all congruent","Vertices":"20, 3 faces meeting at each","Edges":"30, each 3.568 mm","Schläfli symbol":"{5,3}","Dual":"The icosahedron","Dihedral angle":"116.565°, the same on every edge","Size":"9.822 x 9.342 x 7.947 mm, resting on a face","Circumsphere":"10.000 mm across, through every vertex","Midsphere":"9.342 mm across, touching every edge","Insphere":"7.947 mm across, touching every face","Surface area":"262.87 mm²","Volume":"348.15 mm³","Sphere fill":"66.5% of its circumsphere","Isoperimetric quotient":"0.755 (a sphere is 1)","Weight at this size":"6.13 ct in diamond, 5.61 ct in moissanite","Orientation":"Millimetres, Y up, one face resting on the ground plane, centred on the Y axis","Files":"STEP, 3DM, STL, OBJ, FBX, GLB. 3D files only, no cutting files"},"performance":{},"head_on_light":{},"products":[{"type":"3d_files","name":"Dodecahedron 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/04d0cfad-a373-45b6-95dd-0cac29860fb1","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]}],"faq":[{"question":"What files come with the Dodecahedron 3D model?","answer":"Six formats: STEP (the exact solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 12 flat faces."},{"question":"Is there a cutting file for the Dodecahedron?","answer":"No. The Platonic solids are sold as 3D models only, with no faceting design, tier table or diagram."},{"question":"How big is the Dodecahedron model?","answer":"It measures 9.822 x 9.342 x 7.947 mm resting on a face, with every vertex on a sphere 10 mm across. All five Platonic solids share that sphere, so they nest and sit together at true relative size. Scale it uniformly to any size: for a 10 mm edge, scale by 2.8025."},{"question":"How is the Dodecahedron model oriented?","answer":"Y up, with one face resting on the ground plane and the centroid on the Y axis. The midpoint of one edge of the resting face lies on the +X axis, which keeps the cube square to the axes."},{"question":"Can I 3D print or cast the Dodecahedron model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=dodecahedron","gemstone_pages":{}},{"slug":"icosahedron","name":"Icosahedron","url":"https://digitalgemology.com/cuts/icosahedron","markdown":"https://digitalgemology.com/cuts/icosahedron.md","category":"Platonic solids","category_id":"platonic","shape":"solid","facets":20,"size":"10 mm circumsphere","summary":"Twenty equilateral triangles, meeting five at each of twelve vertices, dual to the dodecahedron. It is the roundest of the five by isoperimetric quotient, holding the most volume for its surface area, although the dodecahedron fills more of its own circumsphere.","description":"The icosahedron as an exact 3D model in STEP, 3DM, STL, OBJ, FBX and GLB: 20 faces, 5.257 mm edges, 10 mm circumsphere.","specifications":{"Category":"Platonic solids","Faces":"20 equilateral triangles, all congruent","Vertices":"12, 5 faces meeting at each","Edges":"30, each 5.257 mm","Schläfli symbol":"{3,5}","Dual":"The dodecahedron","Dihedral angle":"138.190°, the same on every edge","Size":"9.822 x 8.507 x 7.947 mm, resting on a face","Circumsphere":"10.000 mm across, through every vertex","Midsphere":"8.507 mm across, touching every edge","Insphere":"7.947 mm across, touching every face","Surface area":"239.36 mm²","Volume":"317.02 mm³","Sphere fill":"60.5% of its circumsphere","Isoperimetric quotient":"0.829 (a sphere is 1)","Weight at this size":"5.58 ct in diamond, 5.10 ct in moissanite","Orientation":"Millimetres, Y up, one face resting on the ground plane, centred on the Y axis","Files":"STEP, 3DM, STL, OBJ, FBX, GLB. 3D files only, no cutting files"},"performance":{},"head_on_light":{},"products":[{"type":"3d_files","name":"Icosahedron 3D files","price_eur":"9.99","licence":"personal use","checkout":"https://digitalgemology.lemonsqueezy.com/checkout/buy/9843dc4f-c068-4b11-ace2-79e43a1e26f1","contents":[{"format":"STEP","use":"Exact faceted solid for CAD"},{"format":"3DM","use":"Rhino, closed mesh on its own layer"},{"format":"STL","use":"Watertight mesh for printing and casting"},{"format":"OBJ","use":"Mesh for modelling and rendering"},{"format":"FBX","use":"Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal"},{"format":"GLB","use":"Web, AR and quick previews"}]}],"faq":[{"question":"What files come with the Icosahedron 3D model?","answer":"Six formats: STEP (the exact solid for CAD), 3DM for Rhino, STL and OBJ meshes, FBX for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal, and GLB for the web and AR. All are in millimetres at real-world scale, with 20 flat faces."},{"question":"Is there a cutting file for the Icosahedron?","answer":"No. The Platonic solids are sold as 3D models only, with no faceting design, tier table or diagram."},{"question":"How big is the Icosahedron model?","answer":"It measures 9.822 x 8.507 x 7.947 mm resting on a face, with every vertex on a sphere 10 mm across. All five Platonic solids share that sphere, so they nest and sit together at true relative size. Scale it uniformly to any size: for a 10 mm edge, scale by 1.9021."},{"question":"How is the Icosahedron model oriented?","answer":"Y up, with one face resting on the ground plane and the centroid on the Y axis. The midpoint of one edge of the resting face lies on the +X axis, which keeps the cube square to the axes."},{"question":"Can I 3D print or cast the Icosahedron model?","answer":"Yes. The mesh is watertight and manifold, with outward normals and no duplicate vertices, so it prints and casts without repair. Use the STEP file when you need the exact solid in CAD."}],"simulator":"https://digitalgemology.com/tools/3d_gemstone_simulator?cut=icosahedron","gemstone_pages":{}}],"cut_in_gemstone":[{"cut":"old-single","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/old-single","headline":"Old Single Cut Diamond: more fire than a modern round, on just 26 facets","summary":"Fire 84 against 78 for the T73, on just 26 facets; the Old Single trails it on scintillation, brilliance, leakage and face-up size for its weight.","scores_line":"Brilliance 72 · Fire 84 · Scintillation 44 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":79,"t73":90,"difference":-11},"brilliance":{"value":72,"t73":93,"difference":-21},"fire":{"value":84,"t73":78,"difference":6},"scintillation":{"value":44,"t73":80,"difference":-36},"spread":{"value":97,"t73":100,"difference":-3},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":78,"t73":100,"difference":-22},"tilt":{"value":94,"t73":92,"difference":2}},"pros":[{"point":"More fire than the modern round","figures":"84 vs 78"}],"cons":[{"point":"Far fewer flashes as it moves","figures":"44 vs 80"},{"point":"Less light back to the eye","figures":"72 vs 93"},{"point":"Light escapes through the pavilion","figures":"19 vs 2"},{"point":"Faces up smaller for its weight","figures":"90 vs 100"}]},{"cut":"mazarin","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/mazarin","headline":"Mazarin Cut Diamond: a historic cushion with far less light than a modern round","summary":"A 42-facet historic cushion. Set against a modern round in diamond, it gives up light, sparkle and fire, and leaks more through the back.","scores_line":"Brilliance 65 · Fire 63 · Scintillation 61 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":75,"t73":90,"difference":-15},"brilliance":{"value":65,"t73":93,"difference":-28},"fire":{"value":63,"t73":78,"difference":-15},"scintillation":{"value":61,"t73":80,"difference":-19},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":69,"t73":100,"difference":-31},"tilt":{"value":100,"t73":92,"difference":8}},"pros":[],"cons":[{"point":"Nearly a third less light face-up","figures":"65 vs 93"},{"point":"Fewer flashes than a modern round","figures":"61 vs 80"},{"point":"Less fire, too","figures":"63 vs 78"},{"point":"Light leaks through the back","figures":"17 vs 2"}]},{"cut":"peruzzi","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/peruzzi","headline":"Peruzzi Cut Diamond: a historic cushion with a modern round's scintillation and less light","summary":"A 74-facet cushion with as much sparkle as a modern round, and less light, less fire and more leakage.","scores_line":"Brilliance 75 · Fire 68 · Scintillation 81 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":78,"t73":90,"difference":-12},"brilliance":{"value":75,"t73":93,"difference":-18},"fire":{"value":68,"t73":78,"difference":-10},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":85,"t73":100,"difference":-15},"shape_norm":{"value":117,"t73":100,"difference":17},"tilt":{"value":92,"t73":92,"difference":0}},"pros":[],"cons":[{"point":"Less light back to the eye","figures":"75 vs 93"},{"point":"Nearly a fifth of the light leaks","figures":"19 vs 2"},{"point":"A less regular pavilion","figures":"85 vs 100"},{"point":"Less fire","figures":"68 vs 78"}]},{"cut":"old-mine","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/old-mine","headline":"Old Mine Cut Diamond: a historic cushion that leaks nearly a third of its light","summary":"A historic cushion that leaks more light than any of our other historic cuts in diamond: 32% against 2% for the T73.","scores_line":"Brilliance 59 · Fire 72 · Scintillation 81 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":74,"t73":90,"difference":-16},"brilliance":{"value":59,"t73":93,"difference":-34},"fire":{"value":72,"t73":78,"difference":-6},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":90,"t73":100,"difference":-10},"shape_norm":{"value":92,"t73":100,"difference":-8},"tilt":{"value":100,"t73":92,"difference":8}},"pros":[],"cons":[{"point":"The least light face-up of our antique cuts","figures":"59 vs 93"},{"point":"Nearly a third of the light leaks","figures":"32 vs 2"},{"point":"A less regular pavilion","figures":"90 vs 100"},{"point":"Less face-up area for its weight","figures":"93 vs 100"}]},{"cut":"old-european","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/old-european","headline":"Old European Cut Diamond: within a few points of the modern round","summary":"A historic round a few points behind the T73 on light, fire and face-up size for its weight, and level on sparkle.","scores_line":"Brilliance 90 · Fire 74 · Scintillation 81 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":88,"t73":90,"difference":-2},"brilliance":{"value":90,"t73":93,"difference":-3},"fire":{"value":74,"t73":78,"difference":-4},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":125,"t73":100,"difference":25},"tilt":{"value":93,"t73":92,"difference":1}},"pros":[],"cons":[{"point":"Slightly smaller for its weight","figures":"95 vs 100"},{"point":"Slightly less fire","figures":"74 vs 78"},{"point":"Slightly less light","figures":"90 vs 93"},{"point":"Slightly more light through the back","figures":"5 vs 2"}]},{"cut":"old-single","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/old-single","headline":"Old Single Cut Moissanite: fire second only to DG-M5 in this stone","summary":"A historic octagon of just 26 facets: in moissanite it scores Fire 99, second only to DG-M5 in this stone, but Scintillation 44 against 80 for the T73.","scores_line":"Brilliance 77 · Fire 99 · Scintillation 44 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":83,"t73":91,"difference":-8},"brilliance":{"value":77,"t73":86,"difference":-9},"fire":{"value":99,"t73":97,"difference":2},"scintillation":{"value":44,"t73":80,"difference":-36},"spread":{"value":97,"t73":100,"difference":-3},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":82,"t73":93,"difference":-11},"tilt":{"value":89,"t73":94,"difference":-5}},"pros":[{"point":"Far more fire than the same cut in diamond","figures":"99 vs 84"},{"point":"Lighter for its size","figures":"0.96 vs 1.05 ct"},{"point":"Leaks less than in diamond","figures":"12 vs 19"}],"cons":[{"point":"Far fewer flashes than a modern round","figures":"44 vs 80"},{"point":"A smaller face than the T73 for its weight","figures":"90 vs 100"},{"point":"Less light than the T73 in moissanite","figures":"77 vs 86"},{"point":"Loses more light when tilted","figures":"89 vs 94"}]},{"cut":"mazarin","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/mazarin","headline":"Mazarin Cut Moissanite: 25 more points of fire than the same cut in diamond","summary":"A historic cushion in moissanite: far higher fire than the diamond version, and Brilliance 61 against 86 for the T73.","scores_line":"Brilliance 61 · Fire 88 · Scintillation 61 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":79,"t73":91,"difference":-12},"brilliance":{"value":61,"t73":86,"difference":-25},"fire":{"value":88,"t73":97,"difference":-9},"scintillation":{"value":61,"t73":80,"difference":-19},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":66,"t73":93,"difference":-27},"tilt":{"value":98,"t73":94,"difference":4}},"pros":[{"point":"Much more fire than in diamond","figures":"88 vs 63"},{"point":"Lighter than the diamond version","figures":"1.21 vs 1.32 ct"}],"cons":[{"point":"Much less light than a modern round","figures":"61 vs 86"},{"point":"Fewer flashes","figures":"61 vs 80"},{"point":"More light leaks than in the T73","figures":"17 vs 7"},{"point":"Slightly less face-up area for its weight","figures":"96 vs 100"}]},{"cut":"peruzzi","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/peruzzi","headline":"Peruzzi Cut Moissanite: a historic cushion with sparkle level with the T73 and strong fire","summary":"A 74-facet historic cushion: Scintillation level with the T73 (81 against 80), Fire 94 against 68 in diamond, and 15% of its light lost through the pavilion.","scores_line":"Brilliance 71 · Fire 94 · Scintillation 81 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":84,"t73":91,"difference":-7},"brilliance":{"value":71,"t73":86,"difference":-15},"fire":{"value":94,"t73":97,"difference":-3},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":85,"t73":100,"difference":-15},"shape_norm":{"value":112,"t73":93,"difference":19},"tilt":{"value":96,"t73":94,"difference":2}},"pros":[{"point":"Much more fire than in diamond","figures":"94 vs 68"},{"point":"Lighter than the diamond version","figures":"1.21 vs 1.32 ct"},{"point":"Holds its light a little better when tilted","figures":"96 vs 92"}],"cons":[{"point":"Less light than a modern round","figures":"71 vs 86"},{"point":"A less regular pavilion","figures":"85 vs 100"},{"point":"A smaller face for its weight","figures":"90 vs 100"},{"point":"More leakage than the T73","figures":"15 vs 7"}]},{"cut":"old-mine","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/old-mine","headline":"Old Mine Cut Moissanite: 13 points more fire than the diamond version","summary":"In moissanite the Old Mine scores Fire 85 against 72 for the same cut in diamond, but Brilliance 60 against 86 for the T73, with 29% leaking.","scores_line":"Brilliance 60 · Fire 85 · Scintillation 81 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":77,"t73":91,"difference":-14},"brilliance":{"value":60,"t73":86,"difference":-26},"fire":{"value":85,"t73":97,"difference":-12},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":90,"t73":100,"difference":-10},"shape_norm":{"value":93,"t73":93,"difference":0},"tilt":{"value":100,"t73":94,"difference":6}},"pros":[{"point":"More fire than in diamond","figures":"85 vs 72"},{"point":"Lighter than the diamond version","figures":"1.10 vs 1.21 ct"}],"cons":[{"point":"A lot less light than a modern round","figures":"60 vs 86"},{"point":"Over a quarter of the light leaks","figures":"29 vs 7"},{"point":"A less regular pavilion","figures":"90 vs 100"},{"point":"Less face for its weight than the T73","figures":"93 vs 100"}]},{"cut":"old-european","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/old-european","headline":"Old European Cut Moissanite: 21 more points of fire than in diamond","summary":"A historic round in moissanite: Fire 95, close to the T73's 97, with Brilliance 79 against 90 for the same cut in diamond.","scores_line":"Brilliance 79 · Fire 95 · Scintillation 81 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":89,"t73":91,"difference":-2},"brilliance":{"value":79,"t73":86,"difference":-7},"fire":{"value":95,"t73":97,"difference":-2},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":123,"t73":93,"difference":30},"tilt":{"value":100,"t73":94,"difference":6}},"pros":[{"point":"Much more fire than in diamond","figures":"95 vs 74"},{"point":"Lighter for its size","figures":"1.00 vs 1.09 ct"}],"cons":[{"point":"Less light than the same cut in diamond","figures":"79 vs 90"},{"point":"A little less face for its weight","figures":"95 vs 100"},{"point":"A little more leakage than in diamond","figures":"9 vs 5"}]},{"cut":"old-single","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/old-single","headline":"Old Single Cut Cubic Zirconia: a simple 26-facet plan, well short of a modern round","summary":"An Old Single of 26 facets. In CZ no score counts as a pro by our rules, and it returns Brilliance 65 against 98 for the T73.","scores_line":"Brilliance 65 · Fire 83 · Scintillation 44 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":76,"t73":93,"difference":-17},"brilliance":{"value":65,"t73":98,"difference":-33},"fire":{"value":83,"t73":87,"difference":-4},"scintillation":{"value":44,"t73":80,"difference":-36},"spread":{"value":97,"t73":100,"difference":-3},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":70,"t73":106,"difference":-36},"tilt":{"value":95,"t73":87,"difference":8}},"pros":[],"cons":[{"point":"Much heavier than diamond","figures":"1.73 vs 1.05 ct"},{"point":"Few flashes: 26 facets against 73","figures":"44 vs 80"},{"point":"A third less light than the T73 in CZ","figures":"65 vs 98"},{"point":"A quarter of the light leaks","figures":"27 vs 1"}]},{"cut":"mazarin","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/mazarin","headline":"Mazarin Cut Cubic Zirconia: more fire than a Mazarin in diamond","summary":"In CZ the Mazarin out-fires the diamond version, 77 against 63, but 21% of the light leaks out through the back.","scores_line":"Brilliance 62 · Fire 77 · Scintillation 61 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":77,"t73":93,"difference":-16},"brilliance":{"value":62,"t73":98,"difference":-36},"fire":{"value":77,"t73":87,"difference":-10},"scintillation":{"value":61,"t73":80,"difference":-19},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":67,"t73":106,"difference":-39},"tilt":{"value":100,"t73":87,"difference":13}},"pros":[{"point":"More fire than in diamond","figures":"77 vs 63"}],"cons":[{"point":"Far heavier than diamond","figures":"2.18 vs 1.32 ct"},{"point":"Much less light than the T73 in CZ","figures":"62 vs 98"},{"point":"A fifth of the light leaks","figures":"21 vs 1"},{"point":"Fewer flashes than a modern round","figures":"61 vs 80"}]},{"cut":"peruzzi","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/peruzzi","headline":"Peruzzi Cut Cubic Zirconia: more fire than the same cut in diamond","summary":"A 74-facet historic cushion in CZ: sparkle level with the T73 and more fire than in diamond, with 30% of the light leaking through the back.","scores_line":"Brilliance 67 · Fire 79 · Scintillation 81 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":78,"t73":93,"difference":-15},"brilliance":{"value":67,"t73":98,"difference":-31},"fire":{"value":79,"t73":87,"difference":-8},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":85,"t73":100,"difference":-15},"shape_norm":{"value":105,"t73":106,"difference":-1},"tilt":{"value":100,"t73":87,"difference":13}},"pros":[{"point":"More fire than in diamond","figures":"79 vs 68"}],"cons":[{"point":"Far heavier than diamond","figures":"2.17 vs 1.32 ct"},{"point":"A third less light than the T73 in CZ","figures":"67 vs 98"},{"point":"Nearly a third of the light leaks","figures":"30 vs 1"},{"point":"A less regular pavilion","figures":"85 vs 100"}]},{"cut":"old-mine","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/old-mine","headline":"Old Mine Cut Cubic Zirconia: more fire than an Old Mine diamond","summary":"The historic cushion in CZ: a little more fire than in diamond, and 33% of the light leaking through the back.","scores_line":"Brilliance 64 · Fire 80 · Scintillation 81 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":77,"t73":93,"difference":-16},"brilliance":{"value":64,"t73":98,"difference":-34},"fire":{"value":80,"t73":87,"difference":-7},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":90,"t73":100,"difference":-10},"shape_norm":{"value":101,"t73":106,"difference":-5},"tilt":{"value":99,"t73":87,"difference":12}},"pros":[{"point":"More fire than in diamond","figures":"80 vs 72"}],"cons":[{"point":"Far heavier than diamond","figures":"1.99 vs 1.21 ct"},{"point":"Much less light than the T73 in CZ","figures":"64 vs 98"},{"point":"A third of the light leaks","figures":"33 vs 1"},{"point":"A less regular pavilion","figures":"90 vs 100"}]},{"cut":"old-european","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/old-european","headline":"Old European Cut Cubic Zirconia: nearly a modern round's light, and more fire than the diamond version","summary":"Of the historic cuts we measure in CZ, only the T57 returns more light: Brilliance 92, with more fire than the same cut in diamond.","scores_line":"Brilliance 92 · Fire 84 · Scintillation 81 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":90,"t73":93,"difference":-3},"brilliance":{"value":92,"t73":98,"difference":-6},"fire":{"value":84,"t73":87,"difference":-3},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":125,"t73":106,"difference":19},"tilt":{"value":91,"t73":87,"difference":4}},"pros":[{"point":"More fire than in diamond","figures":"84 vs 74"}],"cons":[{"point":"Far heavier than diamond","figures":"1.79 vs 1.09 ct"},{"point":"A little less light than the T73 in CZ","figures":"92 vs 98"},{"point":"A little more light leaks than from the T73","figures":"7 vs 1"},{"point":"Faces up a little smaller for its weight","figures":"95 vs 100"}]},{"cut":"old-single","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/old-single","headline":"Old Single Cut Sapphire: an eight cut that leaks half its light","summary":"In sapphire the eight cut lets 54% of its light out of the back, the most of the historic cuts we measure.","scores_line":"Brilliance 36 · Fire 9 · Scintillation 44 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":49,"t73":79,"difference":-30},"brilliance":{"value":36,"t73":94,"difference":-58},"fire":{"value":9,"t73":37,"difference":-28},"scintillation":{"value":44,"t73":80,"difference":-36},"spread":{"value":97,"t73":100,"difference":-3},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":39,"t73":102,"difference":-63},"tilt":{"value":100,"t73":75,"difference":25}},"pros":[],"cons":[{"point":"Almost no fire","figures":"9 vs 84"},{"point":"Little light back to the eye","figures":"36 vs 94"},{"point":"Half the light leaks","figures":"54 vs 5"},{"point":"Few flashes","figures":"44 vs 80"}]},{"cut":"mazarin","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/mazarin","headline":"Mazarin Cut Sapphire: a historic cushion that loses over a third of its light","summary":"The Mazarin, a historic 42-facet cushion, lets 37% of its light out of the back in sapphire, against 5% for the T73.","scores_line":"Brilliance 58 · Fire 40 · Scintillation 61 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":66,"t73":79,"difference":-13},"brilliance":{"value":58,"t73":94,"difference":-36},"fire":{"value":40,"t73":37,"difference":3},"scintillation":{"value":61,"t73":80,"difference":-19},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":63,"t73":102,"difference":-39},"tilt":{"value":100,"t73":75,"difference":25}},"pros":[],"cons":[{"point":"Much less light than the T73 in sapphire","figures":"58 vs 94"},{"point":"Over a third of the light leaks","figures":"37 vs 5"},{"point":"Far less fire than in diamond","figures":"40 vs 63"},{"point":"Fewer flashes than a modern round","figures":"61 vs 80"}]},{"cut":"peruzzi","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/peruzzi","headline":"Peruzzi Cut Sapphire: 74 facets, and half the light out of the back","summary":"The triple cut sparkles like a modern round in any stone. In sapphire half its light leaves through the pavilion.","scores_line":"Brilliance 46 · Fire 22 · Scintillation 81 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":57,"t73":79,"difference":-22},"brilliance":{"value":46,"t73":94,"difference":-48},"fire":{"value":22,"t73":37,"difference":-15},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":85,"t73":100,"difference":-15},"shape_norm":{"value":72,"t73":102,"difference":-30},"tilt":{"value":100,"t73":75,"difference":25}},"pros":[],"cons":[{"point":"Half the T73's light","figures":"46 vs 94"},{"point":"Half the light leaks","figures":"52 vs 5"},{"point":"Little fire","figures":"22 vs 68"},{"point":"Less symmetry than a modern round","figures":"85 vs 100"}]},{"cut":"old-mine","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/old-mine","headline":"Old Mine Cut Sapphire: a historic cushion that loses nearly half its light","summary":"A historic cushion in sapphire: 49% of the light leaves through the back, against 5% for the T73.","scores_line":"Brilliance 50 · Fire 36 · Scintillation 81 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":62,"t73":79,"difference":-17},"brilliance":{"value":50,"t73":94,"difference":-44},"fire":{"value":36,"t73":37,"difference":-1},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":90,"t73":100,"difference":-10},"shape_norm":{"value":78,"t73":102,"difference":-24},"tilt":{"value":100,"t73":75,"difference":25}},"pros":[],"cons":[{"point":"Half the T73's light","figures":"50 vs 94"},{"point":"Half the light leaks","figures":"49 vs 5"},{"point":"Half the fire of the diamond version","figures":"36 vs 72"},{"point":"Heavier than diamond","figures":"1.37 vs 1.21 ct"}]},{"cut":"old-european","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/old-european","headline":"Old European Cut Sapphire: more light than the Mazarin, Peruzzi, Old Mine or Old Single","summary":"Brilliance 78 in sapphire, ahead of the Old Single, Mazarin, Peruzzi and Old Mine: most of the T73's 94, though 22% leaks out of the back.","scores_line":"Brilliance 78 · Fire 39 · Scintillation 81 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":74,"t73":79,"difference":-5},"brilliance":{"value":78,"t73":94,"difference":-16},"fire":{"value":39,"t73":37,"difference":2},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":122,"t73":102,"difference":20},"tilt":{"value":87,"t73":75,"difference":12}},"pros":[],"cons":[{"point":"Far less fire than in diamond","figures":"39 vs 74"},{"point":"Over a fifth of the light leaks","figures":"22 vs 5"},{"point":"Less light than the T73 in sapphire","figures":"78 vs 94"},{"point":"Heavier than diamond","figures":"1.24 vs 1.09 ct"}]},{"cut":"dg-anteros","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/dg-anteros","headline":"DG-Anteros Moissanite: brighter than the T73, with less leakage","summary":"DG-Anteros keeps the T73's plan with new angles: in moissanite it returns Brilliance 92 against 86 for the T73, and leaks 3% against 7%.","scores_line":"Brilliance 92 · Fire 91 · Scintillation 80 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":91,"t73":91,"difference":0},"brilliance":{"value":92,"t73":86,"difference":6},"fire":{"value":91,"t73":97,"difference":-6},"scintillation":{"value":80,"t73":80,"difference":0},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":99,"t73":93,"difference":6},"tilt":{"value":86,"t73":94,"difference":-8}},"pros":[{"point":"Far more fire than in diamond","figures":"91 vs 74"},{"point":"Lighter for its size","figures":"0.89 vs 0.97 ct"},{"point":"More light than the T73 in moissanite","figures":"92 vs 86"},{"point":"Less light lost through the back","figures":"3 vs 7"}],"cons":[{"point":"Keeps less of its light when tilted","figures":"86 vs 94"}]},{"cut":"dg-miliano","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/dg-miliano","headline":"DG-Miliano Diamond: the joint-highest scintillation we measure, and a little more fire than the T73","summary":"Measured in diamond, it scores 98 for scintillation, the highest we measure and shared with two other cuts, and falls behind the T73 on nothing we count.","scores_line":"Brilliance 95 · Fire 82 · Scintillation 98 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":93,"t73":90,"difference":3},"brilliance":{"value":95,"t73":93,"difference":2},"fire":{"value":82,"t73":78,"difference":4},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":102,"t73":100,"difference":2},"tilt":{"value":90,"t73":92,"difference":-2}},"pros":[{"point":"Joint-highest scintillation in our census","figures":"98 vs 80"},{"point":"A little more fire than the T73","figures":"82 vs 78"}],"cons":[]},{"cut":"dg-rafaello","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/dg-rafaello","headline":"DG-Rafaello Diamond: more scintillation than the T73, and it keeps its light as it tips","summary":"A twelve-fold round with a curved, five-tier pavilion. Against the T73 it scores higher for scintillation, faces up a little larger for its weight and holds its light better when tipped; the catch is a slightly leakier pavilion.","scores_line":"Brilliance 94 · Fire 80 · Scintillation 96 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":93,"t73":90,"difference":3},"brilliance":{"value":94,"t73":93,"difference":1},"fire":{"value":80,"t73":78,"difference":2},"scintillation":{"value":96,"t73":80,"difference":16},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":101,"t73":100,"difference":1},"tilt":{"value":97,"t73":92,"difference":5}},"pros":[{"point":"Much more scintillation than the T73","figures":"96 vs 80"},{"point":"A little more face for its weight","figures":"106 vs 100"},{"point":"Holds its light better when tipped","figures":"97 vs 92"}],"cons":[{"point":"A little more light through the back","figures":"5 vs 2"}]},{"cut":"dg-vitruvio","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/dg-vitruvio","headline":"DG-Vitruvio Diamond: the T73's light, with the joint-highest scintillation we measure","summary":"The T73's proportions with a finely faceted girdle: light, fire and leakage level with it, and far more scintillation in our census.","scores_line":"Brilliance 93 · Fire 79 · Scintillation 98 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":92,"t73":90,"difference":2},"brilliance":{"value":93,"t73":93,"difference":0},"fire":{"value":79,"t73":78,"difference":1},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":100,"t73":100,"difference":0},"tilt":{"value":93,"t73":92,"difference":1}},"pros":[{"point":"Far more scintillation than the T73","figures":"98 vs 80"}],"cons":[]},{"cut":"t105-round-brilliant","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/t105-round-brilliant","headline":"T105 Round Brilliant Diamond: more scintillation than the T73 on the same 40.75° pavilion","summary":"The T57 plan divided into 105 facets and finished to a knife edge: more scintillation than the T73, more face for its weight, the least leakage in our diamond census, and a weaker hold on its light when tipped.","scores_line":"Brilliance 95 · Fire 77 · Scintillation 90 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":91,"t73":90,"difference":1},"brilliance":{"value":95,"t73":93,"difference":2},"fire":{"value":77,"t73":78,"difference":-1},"scintillation":{"value":90,"t73":80,"difference":10},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":102,"t73":100,"difference":2},"tilt":{"value":87,"t73":92,"difference":-5}},"pros":[{"point":"More scintillation than the T73","figures":"90 vs 80"},{"point":"More face for its weight than the T73","figures":"106 vs 100"}],"cons":[{"point":"Keeps less of its light when tipped","figures":"87 vs 92"}]},{"cut":"t73-round-brilliant","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/t73-round-brilliant","headline":"T73 Round Brilliant Diamond: the T57's light, with more scintillation and a sixteen-facet girdle","summary":"The round every other diamond page on this site is measured against. Here it faces the T57, the same plan without the girdle band: it gains sparkle, and gives up a little face for its weight.","scores_line":"Brilliance 93 · Fire 78 · Scintillation 80 · in our census, where the T57 scores 92 · 79 · 72 in diamond","scores":{"global":{"value":90,"t73":89,"difference":1},"brilliance":{"value":93,"t73":92,"difference":1},"fire":{"value":78,"t73":79,"difference":-1},"scintillation":{"value":80,"t73":72,"difference":8},"spread":{"value":100,"t73":101,"difference":-1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":100,"t73":99,"difference":1},"tilt":{"value":92,"t73":90,"difference":2}},"pros":[{"point":"More scintillation than the T57","figures":"80 vs 72"}],"cons":[{"point":"Less face for its weight than the T57","figures":"100 vs 107"}]},{"cut":"dg-m5","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/dg-m5","headline":"DG-M5 Diamond: the most brilliance of any cut we measure in this stone","summary":"A twelve-fold house round that returns more light in diamond than any other cut in our census, with a good deal less fire than the T73.","scores_line":"Brilliance 97 · Fire 67 · Scintillation 85 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":88,"t73":90,"difference":-2},"brilliance":{"value":97,"t73":93,"difference":4},"fire":{"value":67,"t73":78,"difference":-11},"scintillation":{"value":85,"t73":80,"difference":5},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":104,"t73":100,"difference":4},"tilt":{"value":83,"t73":92,"difference":-9}},"pros":[{"point":"More scintillation than the T73","figures":"85 vs 80"},{"point":"The most light we measure in diamond","figures":"97 vs 93"}],"cons":[{"point":"Much less fire than the T73","figures":"67 vs 78"},{"point":"Keeps less of its light when tipped","figures":"83 vs 92"}]},{"cut":"dg-anteros","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/dg-anteros","headline":"DG-Anteros Diamond: level with the T73 on light, behind it on fire and tilt","summary":"DG-Anteros has the T73's 73 facets on a 40.1° pavilion, against the T73's 40.75°. In diamond it keeps level with the T73 on light, and loses on fire and on how it holds light when tipped.","scores_line":"Brilliance 95 · Fire 74 · Scintillation 80 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":88,"t73":90,"difference":-2},"brilliance":{"value":95,"t73":93,"difference":2},"fire":{"value":74,"t73":78,"difference":-4},"scintillation":{"value":80,"t73":80,"difference":0},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":102,"t73":100,"difference":2},"tilt":{"value":85,"t73":92,"difference":-7}},"pros":[],"cons":[{"point":"Keeps less light when tipped","figures":"85 vs 92"},{"point":"Less fire than the T73","figures":"74 vs 78"}]},{"cut":"t57-round-brilliant","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/t57-round-brilliant","headline":"T57 Round Brilliant Diamond: more face for its weight than the modern round, and level on light","summary":"The 57-facet round with a knife-edge girdle. In diamond it is level with the T73 on light by our margins, faces up larger for its weight, and falls clearly behind only on sparkle.","scores_line":"Brilliance 92 · Fire 79 · Scintillation 72 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":89,"t73":90,"difference":-1},"brilliance":{"value":92,"t73":93,"difference":-1},"fire":{"value":79,"t73":78,"difference":1},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":99,"t73":100,"difference":-1},"tilt":{"value":90,"t73":92,"difference":-2}},"pros":[{"point":"More face for its weight than the T73","figures":"107 vs 100"}],"cons":[{"point":"Less scintillation than the T73","figures":"72 vs 80"}]},{"cut":"portuguese-birds-nest","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/portuguese-birds-nest","headline":"Portuguese Bird's Nest Cut Diamond: as much scintillation as any cut we measure","summary":"A woven nest of facets that scores as high for scintillation as anything we measure, yet in diamond returns less light and less fire than the T73, and leaks more.","scores_line":"Brilliance 85 · Fire 65 · Scintillation 98 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":86,"t73":90,"difference":-4},"brilliance":{"value":85,"t73":93,"difference":-8},"fire":{"value":65,"t73":78,"difference":-13},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":91,"t73":100,"difference":-9},"tilt":{"value":100,"t73":92,"difference":8}},"pros":[{"point":"Scintillation as high as any cut we measure","figures":"98 vs 80"}],"cons":[{"point":"Much less fire than the T73","figures":"65 vs 78"},{"point":"Far more light leaks than in the T73","figures":"13 vs 2"},{"point":"Less light back to the eye","figures":"85 vs 93"}]},{"cut":"trilliant","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/trilliant","headline":"Trilliant Cut Diamond: more fire than a modern round, on three straight sides","summary":"A three-sided brilliant with straight sides: more fire than the T73, and five scores behind it by our margins, the largest an uneven pavilion.","scores_line":"Brilliance 78 · Fire 83 · Scintillation 79 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":80,"t73":90,"difference":-10},"brilliance":{"value":78,"t73":93,"difference":-15},"fire":{"value":83,"t73":78,"difference":5},"scintillation":{"value":79,"t73":80,"difference":-1},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":62,"t73":100,"difference":-38},"shape_norm":{"value":91,"t73":100,"difference":-9},"tilt":{"value":89,"t73":92,"difference":-3}},"pros":[{"point":"More fire than the T73","figures":"83 vs 78"}],"cons":[{"point":"An uneven pavilion","figures":"62 vs 100"},{"point":"Much less light than a round","figures":"78 vs 93"},{"point":"More light lost through the back","figures":"11 vs 2"},{"point":"Less face for its weight than a round","figures":"93 vs 100"}]},{"cut":"marquise","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/marquise","headline":"Marquise Cut Diamond: as much face for its weight as any cut we measure, with strong fire","summary":"Pointed at both ends and long for its width: more face for its weight, more fire and more sparkle than the T73, and much less light.","scores_line":"Brilliance 64 · Fire 89 · Scintillation 86 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":80,"t73":90,"difference":-10},"brilliance":{"value":64,"t73":93,"difference":-29},"fire":{"value":89,"t73":78,"difference":11},"scintillation":{"value":86,"t73":80,"difference":6},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":94,"t73":100,"difference":-6},"shape_norm":{"value":74,"t73":100,"difference":-26},"tilt":{"value":87,"t73":92,"difference":-5}},"pros":[{"point":"As much face for its weight as any cut we measure","figures":"121 vs 100"},{"point":"More fire than the T73","figures":"89 vs 78"},{"point":"More scintillation than the T73","figures":"86 vs 80"}],"cons":[{"point":"Far less light than a round","figures":"64 vs 93"},{"point":"Much more light through the back","figures":"17 vs 2"},{"point":"A slightly less regular pavilion","figures":"94 vs 100"},{"point":"Keeps a little less light when tipped","figures":"87 vs 92"}]},{"cut":"cushion","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/cushion","headline":"Cushion Cut Diamond: more scintillation than a modern round, in a round-cornered square","summary":"A square with rounded corners and a brilliant plan: more sparkle than the T73, less light and less fire, and about the same face for its weight.","scores_line":"Brilliance 80 · Fire 73 · Scintillation 85 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":84,"t73":90,"difference":-6},"brilliance":{"value":80,"t73":93,"difference":-13},"fire":{"value":73,"t73":78,"difference":-5},"scintillation":{"value":85,"t73":80,"difference":5},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":97,"t73":100,"difference":-3},"shape_norm":{"value":93,"t73":100,"difference":-7},"tilt":{"value":92,"t73":92,"difference":0}},"pros":[{"point":"More scintillation than the T73","figures":"85 vs 80"}],"cons":[{"point":"Less light than a round","figures":"80 vs 93"},{"point":"More light through the back","figures":"9 vs 2"},{"point":"A little less fire","figures":"73 vs 78"}]},{"cut":"square","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/square","headline":"Square Cut Diamond: the most light of the square cuts we measure in this stone, still short of a round","summary":"The square counterpart of the round brilliant. It returns more light than any other square cut we measure in diamond, and still trails the T73 on four scores.","scores_line":"Brilliance 85 · Fire 72 · Scintillation 78 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":84,"t73":90,"difference":-6},"brilliance":{"value":85,"t73":93,"difference":-8},"fire":{"value":72,"t73":78,"difference":-6},"scintillation":{"value":78,"t73":80,"difference":-2},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":112,"t73":100,"difference":12},"tilt":{"value":86,"t73":92,"difference":-6}},"pros":[],"cons":[{"point":"Less light than a round","figures":"85 vs 93"},{"point":"More light leaks through the back","figures":"10 vs 2"},{"point":"Less fire than the T73","figures":"72 vs 78"},{"point":"Loses more light when tipped","figures":"86 vs 92"}]},{"cut":"trillion","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/trillion","headline":"Trillion Cut Diamond: more fire than a modern round, in a three-sided outline with bowed sides","summary":"A three-sided brilliant with gently bowed sides: more fire than the T73, no more face for its weight in spite of a shallow profile, and a heavy cost in light.","scores_line":"Brilliance 67 · Fire 87 · Scintillation 80 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":81,"t73":90,"difference":-9},"brilliance":{"value":67,"t73":93,"difference":-26},"fire":{"value":87,"t73":78,"difference":9},"scintillation":{"value":80,"t73":80,"difference":0},"spread":{"value":107,"t73":100,"difference":7},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":78,"t73":100,"difference":-22},"tilt":{"value":87,"t73":92,"difference":-5}},"pros":[{"point":"More fire than the T73","figures":"87 vs 78"}],"cons":[{"point":"Much less light than a round","figures":"67 vs 93"},{"point":"Much more light leaks","figures":"13 vs 2"},{"point":"A little less light when tipped","figures":"87 vs 92"}]},{"cut":"dg-octagonal-kite","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/dg-octagonal-kite","headline":"DG-Octagonal Kite Diamond: a little more fire than the T73, with most of a round's light","summary":"An eight-fold house cut of kites around a large octagonal table. In diamond it keeps most of a round's light and adds a little fire, with far fewer flashes.","scores_line":"Brilliance 88 · Fire 82 · Scintillation 60 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":86,"t73":90,"difference":-4},"brilliance":{"value":88,"t73":93,"difference":-5},"fire":{"value":82,"t73":78,"difference":4},"scintillation":{"value":60,"t73":80,"difference":-20},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":102,"t73":100,"difference":2},"tilt":{"value":89,"t73":92,"difference":-3}},"pros":[{"point":"A little more fire than the T73","figures":"82 vs 78"}],"cons":[{"point":"Far fewer flashes than a round","figures":"60 vs 80"},{"point":"Less face for its weight than a round","figures":"94 vs 100"},{"point":"A little less light than the T73","figures":"88 vs 93"},{"point":"Some light leaks through the back","figures":"7 vs 2"}]},{"cut":"oval","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/oval","headline":"Oval Cut Diamond: the second-most fire of any cut we measure in this stone","summary":"Stretched from a round, the oval shows far more fire than the T73, a little more sparkle and a larger face for its weight. It also lets out more than a quarter of its light.","scores_line":"Brilliance 47 · Fire 92 · Scintillation 87 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":75,"t73":90,"difference":-15},"brilliance":{"value":47,"t73":93,"difference":-46},"fire":{"value":92,"t73":78,"difference":14},"scintillation":{"value":87,"t73":80,"difference":7},"spread":{"value":99,"t73":100,"difference":-1},"symmetry":{"value":98,"t73":100,"difference":-2},"shape_norm":{"value":54,"t73":100,"difference":-46},"tilt":{"value":92,"t73":92,"difference":0}},"pros":[{"point":"Far more fire than the T73","figures":"92 vs 78"},{"point":"More face for its weight than the T73","figures":"108 vs 100"},{"point":"More scintillation than the T73","figures":"87 vs 80"}],"cons":[{"point":"About half the light of the T73","figures":"47 vs 93"},{"point":"More than a quarter of the light leaks","figures":"27 vs 2"}]},{"cut":"asscher","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/asscher","headline":"Asscher Cut Diamond: a square step cut with no lead over a round by our margins","summary":"A square step cut with deeply cropped corners: nothing ahead of the T73 by our margins, and behind it on brilliance, tilt, leakage and scintillation.","scores_line":"Brilliance 69 · Fire 80 · Scintillation 72 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":78,"t73":90,"difference":-12},"brilliance":{"value":69,"t73":93,"difference":-24},"fire":{"value":80,"t73":78,"difference":2},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":107,"t73":100,"difference":7},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":91,"t73":100,"difference":-9},"tilt":{"value":79,"t73":92,"difference":-13}},"pros":[],"cons":[{"point":"Much less light than a round","figures":"69 vs 93"},{"point":"Loses more light when tipped","figures":"79 vs 92"},{"point":"More light through the back","figures":"11 vs 2"},{"point":"Fewer flashes than a round","figures":"72 vs 80"}]},{"cut":"emerald-square","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/emerald-square","headline":"Emerald Square Cut Diamond: more fire than a modern round, on a stepped square","summary":"The emerald step cut on a square outline: more fire than the T73, much less light, and a face no larger per carat than a round's.","scores_line":"Brilliance 64 · Fire 84 · Scintillation 72 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":76,"t73":90,"difference":-14},"brilliance":{"value":64,"t73":93,"difference":-29},"fire":{"value":84,"t73":78,"difference":6},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":108,"t73":100,"difference":8},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":84,"t73":100,"difference":-16},"tilt":{"value":79,"t73":92,"difference":-13}},"pros":[{"point":"More fire than the T73","figures":"84 vs 78"}],"cons":[{"point":"Much less light than a round","figures":"64 vs 93"},{"point":"More light through the back","figures":"17 vs 2"},{"point":"Darkens more when tipped","figures":"79 vs 92"},{"point":"Fewer flashes than a round","figures":"72 vs 80"}]},{"cut":"dg-m5","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/dg-m5","headline":"DG-M5 Moissanite: our highest light and fire scores in this stone","summary":"A twelve-fold round with one pavilion angle. In moissanite DG-M5 returns more light than any other cut we measure, and lets almost none of it out of the back.","scores_line":"Brilliance 98 · Fire 100 · Scintillation 85 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":95,"t73":91,"difference":4},"brilliance":{"value":98,"t73":86,"difference":12},"fire":{"value":100,"t73":97,"difference":3},"scintillation":{"value":85,"t73":80,"difference":5},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":105,"t73":93,"difference":12},"tilt":{"value":84,"t73":94,"difference":-10}},"pros":[{"point":"The top of our fire scale","figures":"100 vs 67"},{"point":"More light back than the T73","figures":"98 vs 86"},{"point":"Lighter than a diamond of the same width","figures":"0.90 vs 0.98 ct"},{"point":"Almost no light lost through the back","figures":"1 vs 7"}],"cons":[{"point":"Gives back some light when tipped","figures":"84 vs 94"}]},{"cut":"dg-vitruvio","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/dg-vitruvio","headline":"DG-Vitruvio Moissanite: more fire than in diamond, more sparkle than the T73","summary":"The T-series crown and pavilion, with the girdle cut into a band of small facets. In moissanite it keeps the T73's light and fire and outscores it on sparkle.","scores_line":"Brilliance 86 · Fire 97 · Scintillation 98 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":93,"t73":91,"difference":2},"brilliance":{"value":86,"t73":86,"difference":0},"fire":{"value":97,"t73":97,"difference":0},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":93,"t73":93,"difference":0},"tilt":{"value":94,"t73":94,"difference":0}},"pros":[{"point":"Far more fire than in diamond","figures":"97 vs 79"},{"point":"Sparkle at the top of our scale","figures":"98 vs 80"},{"point":"Lighter than the same round in diamond","figures":"0.93 vs 1.02 ct"}],"cons":[{"point":"Less light than in diamond","figures":"86 vs 93"},{"point":"More leakage than in diamond","figures":"7 vs 2"}]},{"cut":"dg-miliano","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/dg-miliano","headline":"DG-Miliano Moissanite: sparkle at the top of our scale, with the T73's light","summary":"A three-tier pavilion under a ninety-six-facet girdle: in moissanite the census rewards it with sparkle, while its light only matches the T73's.","scores_line":"Brilliance 86 · Fire 93 · Scintillation 98 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":92,"t73":91,"difference":1},"brilliance":{"value":86,"t73":86,"difference":0},"fire":{"value":93,"t73":97,"difference":-4},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":92,"t73":93,"difference":-1},"tilt":{"value":95,"t73":94,"difference":1}},"pros":[{"point":"Sparkle at the top of our scale","figures":"98 vs 80"},{"point":"More fire than the diamond version","figures":"93 vs 82"},{"point":"Lighter than in diamond","figures":"0.94 vs 1.03 ct"}],"cons":[{"point":"Less light than in diamond","figures":"86 vs 95"},{"point":"More leakage than in diamond","figures":"8 vs 3"}]},{"cut":"t105-round-brilliant","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/t105-round-brilliant","headline":"T105 Round Brilliant Moissanite: more fire than in diamond, more sparkle and more face per carat than the T73","summary":"Forty-eight more facets than the T57 and a knife-edge girdle: in moissanite the T105 sparkles more than the T73 and shows a larger face for its weight, at the same light and fire.","scores_line":"Brilliance 86 · Fire 97 · Scintillation 90 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":92,"t73":91,"difference":1},"brilliance":{"value":86,"t73":86,"difference":0},"fire":{"value":97,"t73":97,"difference":0},"scintillation":{"value":90,"t73":80,"difference":10},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":93,"t73":93,"difference":0},"tilt":{"value":91,"t73":94,"difference":-3}},"pros":[{"point":"Far more fire than in diamond","figures":"97 vs 77"},{"point":"Sparkle ahead of the T73","figures":"90 vs 80"},{"point":"Lighter than in diamond","figures":"0.84 vs 0.92 ct"},{"point":"A larger face for its weight than the T73","figures":"106 vs 100"}],"cons":[{"point":"Less light than in diamond","figures":"86 vs 95"},{"point":"More leakage than in diamond","figures":"6 vs 1"},{"point":"Keeps a little less light when tipped","figures":"91 vs 94"}]},{"cut":"dg-rafaello","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/dg-rafaello","headline":"DG-Rafaello Moissanite: more sparkle than the T73, and more face for its weight","summary":"A twelve-fold round with a pavilion that curves in five tiers. In moissanite it sparkles more than the T73 and shows a larger face for the same weight.","scores_line":"Brilliance 84 · Fire 90 · Scintillation 96 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":91,"t73":91,"difference":0},"brilliance":{"value":84,"t73":86,"difference":-2},"fire":{"value":90,"t73":97,"difference":-7},"scintillation":{"value":96,"t73":80,"difference":16},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":91,"t73":93,"difference":-2},"tilt":{"value":98,"t73":94,"difference":4}},"pros":[{"point":"More sparkle than the T73","figures":"96 vs 80"},{"point":"More fire than in diamond","figures":"90 vs 80"},{"point":"Lighter for its width than diamond","figures":"0.86 vs 0.94 ct"},{"point":"More face for its weight than the T73","figures":"106 vs 100"}],"cons":[{"point":"Less light than in diamond","figures":"84 vs 94"},{"point":"More leakage than in diamond","figures":"12 vs 5"}]},{"cut":"t73-round-brilliant","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/t73-round-brilliant","headline":"T73 Round Brilliant Moissanite: the modern round, with far more fire than in diamond","summary":"Our benchmark round in moissanite: Fire 97 against 78 in diamond, a little less light (86 against 93), and against the T57 more sparkle (80 against 72) but less face for its weight (100 against 107).","scores_line":"Brilliance 86 · Fire 97 · Scintillation 80 · in our census, where the T57 scores 85 · 98 · 72 in moissanite","scores":{"global":{"value":91,"t73":90,"difference":1},"brilliance":{"value":86,"t73":85,"difference":1},"fire":{"value":97,"t73":98,"difference":-1},"scintillation":{"value":80,"t73":72,"difference":8},"spread":{"value":100,"t73":101,"difference":-1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":93,"t73":92,"difference":1},"tilt":{"value":94,"t73":93,"difference":1}},"pros":[{"point":"Far more fire than a diamond T73","figures":"97 vs 78"},{"point":"Lighter than a diamond T73","figures":"0.92 vs 1.01 ct"},{"point":"More sparkle than the T57","figures":"80 vs 72"}],"cons":[{"point":"Less light than in diamond","figures":"86 vs 93"},{"point":"Less face for its weight than the T57","figures":"100 vs 107"},{"point":"More leakage than in diamond","figures":"7 vs 2"}]},{"cut":"t57-round-brilliant","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/t57-round-brilliant","headline":"T57 Round Brilliant Moissanite: near-top fire in the plainest round brilliant plan","summary":"The knife-edge round with nothing added: in moissanite its fire sits near the top of our scale, it faces up larger than the T73 for its weight, and its sparkle trails the T73's.","scores_line":"Brilliance 85 · Fire 98 · Scintillation 72 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":90,"t73":91,"difference":-1},"brilliance":{"value":85,"t73":86,"difference":-1},"fire":{"value":98,"t73":97,"difference":1},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":92,"t73":93,"difference":-1},"tilt":{"value":93,"t73":94,"difference":-1}},"pros":[{"point":"Far more fire than a diamond T57","figures":"98 vs 79"},{"point":"Lighter than in diamond","figures":"0.84 vs 0.92 ct"},{"point":"The largest face per carat of the rounds we sell","figures":"107 vs 100"}],"cons":[{"point":"Less sparkle than the T73","figures":"72 vs 80"},{"point":"Less light than in diamond","figures":"85 vs 92"},{"point":"More leakage than in diamond","figures":"8 vs 2"}]},{"cut":"portuguese-birds-nest","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/portuguese-birds-nest","headline":"Portuguese Bird's Nest Cut Moissanite: far more fire than in diamond, and steady under tilt","summary":"Sixteen-fold and woven from 177 facets: in moissanite the bird's nest scores far higher for fire than in diamond (95 against 65), sparkles at the top of our scale and barely darkens when tipped.","scores_line":"Brilliance 82 · Fire 95 · Scintillation 98 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":92,"t73":91,"difference":1},"brilliance":{"value":82,"t73":86,"difference":-4},"fire":{"value":95,"t73":97,"difference":-2},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":88,"t73":93,"difference":-5},"tilt":{"value":100,"t73":94,"difference":6}},"pros":[{"point":"Far more fire than in diamond","figures":"95 vs 65"},{"point":"Sparkle at the top of our scale","figures":"98 vs 80"},{"point":"Lighter than in diamond","figures":"1.02 vs 1.11 ct"},{"point":"Keeps its light when tipped","figures":"100 vs 94"}],"cons":[{"point":"A little less light than the T73","figures":"82 vs 86"},{"point":"Slightly more leakage than the T73","figures":"10 vs 7"}]},{"cut":"cushion","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/cushion","headline":"Cushion Cut Moissanite: far more fire than a diamond cushion","summary":"A square with rounded corners over a brilliant plan: in moissanite the cushion scores far higher for fire than in diamond (93 against 73), and lower for brilliance than a round (74 against 86).","scores_line":"Brilliance 74 · Fire 93 · Scintillation 85 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":85,"t73":91,"difference":-6},"brilliance":{"value":74,"t73":86,"difference":-12},"fire":{"value":93,"t73":97,"difference":-4},"scintillation":{"value":85,"t73":80,"difference":5},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":97,"t73":100,"difference":-3},"shape_norm":{"value":86,"t73":93,"difference":-7},"tilt":{"value":91,"t73":94,"difference":-3}},"pros":[{"point":"Far more fire than a diamond cushion","figures":"93 vs 73"},{"point":"Lighter than a diamond cushion","figures":"1.16 vs 1.27 ct"},{"point":"Slightly more sparkle than the T73","figures":"85 vs 80"}],"cons":[{"point":"Much less light than a round","figures":"74 vs 86"},{"point":"More leakage than a round","figures":"12 vs 7"},{"point":"Keeps a little less light when tipped","figures":"91 vs 94"}]},{"cut":"square","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/square","headline":"Square Cut Moissanite: the brightest square outline in this stone, and fiery","summary":"The square counterpart of the round brilliant: in moissanite it is the brightest square outline we measure, and still a step behind the T73.","scores_line":"Brilliance 82 · Fire 91 · Scintillation 78 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":87,"t73":91,"difference":-4},"brilliance":{"value":82,"t73":86,"difference":-4},"fire":{"value":91,"t73":97,"difference":-6},"scintillation":{"value":78,"t73":80,"difference":-2},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":108,"t73":93,"difference":15},"tilt":{"value":88,"t73":94,"difference":-6}},"pros":[{"point":"Far more fire than in diamond","figures":"91 vs 72"},{"point":"Lighter than a diamond square","figures":"1.04 vs 1.14 ct"}],"cons":[{"point":"Loses more light when tipped","figures":"88 vs 94"},{"point":"A little less light than the T73","figures":"82 vs 86"},{"point":"Slightly more leakage than the T73","figures":"11 vs 7"}]},{"cut":"trilliant","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/trilliant","headline":"Trilliant Cut Moissanite: three straight sides, with more fire than in diamond","summary":"Three straight sides over a brilliant plan: in moissanite the trilliant is fiery and the brightest triangle we measure, with an uneven pavilion and less light than a round.","scores_line":"Brilliance 71 · Fire 95 · Scintillation 79 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":80,"t73":91,"difference":-11},"brilliance":{"value":71,"t73":86,"difference":-15},"fire":{"value":95,"t73":97,"difference":-2},"scintillation":{"value":79,"t73":80,"difference":-1},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":62,"t73":100,"difference":-38},"shape_norm":{"value":83,"t73":93,"difference":-10},"tilt":{"value":90,"t73":94,"difference":-4}},"pros":[{"point":"More fire than a diamond trilliant","figures":"95 vs 83"},{"point":"Lighter than in diamond","figures":"0.88 vs 0.96 ct"}],"cons":[{"point":"An uneven pavilion","figures":"62 vs 100"},{"point":"Less light than a round","figures":"71 vs 86"},{"point":"Less face for its weight than a round","figures":"93 vs 100"},{"point":"Keeps a little less light when tipped","figures":"90 vs 94"}]},{"cut":"marquise","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/marquise","headline":"Marquise Cut Moissanite: far more face for its weight than a round","summary":"The pointed navette in moissanite: at the same weight it covers more area than a round (121 against 100), weighs less than diamond and sparkles a little more than the T73, but returns Brilliance 59 against 86.","scores_line":"Brilliance 59 · Fire 94 · Scintillation 86 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":79,"t73":91,"difference":-12},"brilliance":{"value":59,"t73":86,"difference":-27},"fire":{"value":94,"t73":97,"difference":-3},"scintillation":{"value":86,"t73":80,"difference":6},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":94,"t73":100,"difference":-6},"shape_norm":{"value":68,"t73":93,"difference":-25},"tilt":{"value":91,"t73":94,"difference":-3}},"pros":[{"point":"A larger face for its weight than a round","figures":"121 vs 100"},{"point":"Lighter than a diamond marquise","figures":"1.91 vs 2.09 ct"},{"point":"A little more sparkle than the T73","figures":"86 vs 80"},{"point":"A little more fire than in diamond","figures":"94 vs 89"}],"cons":[{"point":"Much less light than a round","figures":"59 vs 86"},{"point":"Far more leakage than a round","figures":"19 vs 7"},{"point":"A slightly less regular pavilion","figures":"94 vs 100"}]},{"cut":"trillion","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/trillion","headline":"Trillion Cut Moissanite: more fire than in diamond, and lighter for its size","summary":"A three-sided brilliant with gently bowed sides: in moissanite it scores higher for fire than a diamond trillion and faces up as large as a round of its weight, with much less light.","scores_line":"Brilliance 60 · Fire 93 · Scintillation 80 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":81,"t73":91,"difference":-10},"brilliance":{"value":60,"t73":86,"difference":-26},"fire":{"value":93,"t73":97,"difference":-4},"scintillation":{"value":80,"t73":80,"difference":0},"spread":{"value":107,"t73":100,"difference":7},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":69,"t73":93,"difference":-24},"tilt":{"value":92,"t73":94,"difference":-2}},"pros":[{"point":"Lighter than a diamond trillion","figures":"0.73 vs 0.80 ct"},{"point":"More fire than in diamond","figures":"93 vs 87"}],"cons":[{"point":"Much less light than a round","figures":"60 vs 86"},{"point":"More leakage than a round","figures":"12 vs 7"}]},{"cut":"radiant-square","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/radiant-square","headline":"Radiant Square Cut Moissanite: a big fire gain over diamond, with less light than the T73","summary":"Cropped corners over a brilliant plan: in moissanite the radiant square gains more fire over diamond than almost any cut we measure, but falls well behind the round on light and sparkle.","scores_line":"Brilliance 71 · Fire 93 · Scintillation 66 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":82,"t73":91,"difference":-9},"brilliance":{"value":71,"t73":86,"difference":-15},"fire":{"value":93,"t73":97,"difference":-4},"scintillation":{"value":66,"t73":80,"difference":-14},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":82,"t73":93,"difference":-11},"tilt":{"value":88,"t73":94,"difference":-6}},"pros":[{"point":"Far more fire than in diamond","figures":"93 vs 62"},{"point":"Lighter than in diamond","figures":"1.48 vs 1.62 ct"}],"cons":[{"point":"Much less light than a round","figures":"71 vs 86"},{"point":"Fewer flashes than a round","figures":"66 vs 80"},{"point":"Less face for its weight than a round","figures":"91 vs 100"},{"point":"Loses more light when tipped","figures":"88 vs 94"}]},{"cut":"asscher","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/asscher","headline":"Asscher Cut Moissanite: strong fire in a square step cut","summary":"The square step cut with deeply cropped corners: in moissanite it is fiery and faces up much like a round of its weight, but it is darker, more so as it tips.","scores_line":"Brilliance 64 · Fire 94 · Scintillation 72 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":79,"t73":91,"difference":-12},"brilliance":{"value":64,"t73":86,"difference":-22},"fire":{"value":94,"t73":97,"difference":-3},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":107,"t73":100,"difference":7},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":85,"t73":93,"difference":-8},"tilt":{"value":77,"t73":94,"difference":-17}},"pros":[{"point":"More fire than a diamond Asscher","figures":"94 vs 80"},{"point":"Lighter than in diamond","figures":"1.23 vs 1.34 ct"}],"cons":[{"point":"Much less light than a round","figures":"64 vs 86"},{"point":"Darkens as it tips","figures":"77 vs 94"},{"point":"Fewer flashes than a round","figures":"72 vs 80"},{"point":"More leakage than a round","figures":"12 vs 7"}]},{"cut":"octagon","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/octagon","headline":"Octagon Cut Moissanite: strong fire, and light that holds when tipped","summary":"Eight sides, a stepped crown and a three-tier pavilion: in moissanite the octagon is fiery and steady under tilt, and leaks a fifth of its light.","scores_line":"Brilliance 67 · Fire 94 · Scintillation 66 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":82,"t73":91,"difference":-9},"brilliance":{"value":67,"t73":86,"difference":-19},"fire":{"value":94,"t73":97,"difference":-3},"scintillation":{"value":66,"t73":80,"difference":-14},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":88,"t73":93,"difference":-5},"tilt":{"value":100,"t73":94,"difference":6}},"pros":[{"point":"More fire than a diamond octagon","figures":"94 vs 76"},{"point":"Lighter than in diamond","figures":"1.13 vs 1.23 ct"},{"point":"Keeps its light when tipped","figures":"100 vs 97"}],"cons":[{"point":"Much less light than a round","figures":"67 vs 86"},{"point":"Fewer flashes than a round","figures":"66 vs 80"},{"point":"A fifth of the light leaks","figures":"20 vs 7"},{"point":"A little less face for its weight than a round","figures":"95 vs 100"}]},{"cut":"dg-octagonal-kite","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/dg-octagonal-kite","headline":"DG-Octagonal Kite Moissanite: plenty of fire, far more than in diamond","summary":"An octagonal kite design measured in moissanite: Fire 95 against 82 in diamond, Scintillation 60 from 41 facets, and Brilliance 71 against 88 for the diamond version.","scores_line":"Brilliance 71 · Fire 95 · Scintillation 60 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":84,"t73":91,"difference":-7},"brilliance":{"value":71,"t73":86,"difference":-15},"fire":{"value":95,"t73":97,"difference":-2},"scintillation":{"value":60,"t73":80,"difference":-20},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":82,"t73":93,"difference":-11},"tilt":{"value":100,"t73":94,"difference":6}},"pros":[{"point":"Far more fire than in diamond","figures":"95 vs 82"},{"point":"Lighter than in diamond","figures":"1.14 vs 1.25 ct"}],"cons":[{"point":"Sparse sparkle","figures":"60 vs 80"},{"point":"Less light than the diamond version","figures":"71 vs 88"},{"point":"More leakage than a round","figures":"14 vs 7"},{"point":"Less face for its weight than a round","figures":"94 vs 100"}]},{"cut":"dg-miliano","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-miliano","headline":"DG-Miliano Cubic Zirconia: the modern round's light, with far more sparkle","summary":"A 177-facet round that keeps level with the T73 on light in CZ, then beats it on sparkle, on fire and on holding its light when tipped.","scores_line":"Brilliance 97 · Fire 90 · Scintillation 98 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":95,"t73":93,"difference":2},"brilliance":{"value":97,"t73":98,"difference":-1},"fire":{"value":90,"t73":87,"difference":3},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":104,"t73":106,"difference":-2},"tilt":{"value":90,"t73":87,"difference":3}},"pros":[{"point":"Much finer sparkle than the T73","figures":"98 vs 80"},{"point":"More fire than DG-Miliano in diamond","figures":"90 vs 82"},{"point":"Holds its light a little better when tipped","figures":"90 vs 87"}],"cons":[{"point":"About two-thirds heavier than diamond","figures":"1.70 vs 1.03 ct"}]},{"cut":"dg-rafaello","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-rafaello","headline":"DG-Rafaello Cubic Zirconia: the most light of any cut we measure in this stone","summary":"DG-Rafaello reaches Brilliance 100 in CZ: the top of our scale, and no other cut we measure in this stone gets there.","scores_line":"Brilliance 100 · Fire 87 · Scintillation 96 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":95,"t73":93,"difference":2},"brilliance":{"value":100,"t73":98,"difference":2},"fire":{"value":87,"t73":87,"difference":0},"scintillation":{"value":96,"t73":80,"difference":16},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":107,"t73":106,"difference":1},"tilt":{"value":88,"t73":87,"difference":1}},"pros":[{"point":"Far finer sparkle than the T73","figures":"96 vs 80"},{"point":"More fire than the diamond version","figures":"87 vs 80"},{"point":"More light than DG-Rafaello in diamond","figures":"100 vs 94"},{"point":"A larger face than the T73 for its weight","figures":"106 vs 100"}],"cons":[{"point":"Heavier than diamond, by the material","figures":"1.55 vs 0.94 ct"},{"point":"Less steady than the diamond version when tipped","figures":"88 vs 97"}]},{"cut":"dg-vitruvio","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-vitruvio","headline":"DG-Vitruvio Cubic Zirconia: the T73's light, with far more sparkle","summary":"Point for point it matches the T73 in CZ on light, fire and leakage, then adds Scintillation 98, the highest we measure, shared with DG-Miliano and the Portuguese Bird's Nest.","scores_line":"Brilliance 98 · Fire 87 · Scintillation 98 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":95,"t73":93,"difference":2},"brilliance":{"value":98,"t73":98,"difference":0},"fire":{"value":87,"t73":87,"difference":0},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":106,"t73":106,"difference":0},"tilt":{"value":87,"t73":87,"difference":0}},"pros":[{"point":"Far more sparkle than the T73","figures":"98 vs 80"},{"point":"More fire than DG-Vitruvio in diamond","figures":"87 vs 79"},{"point":"More light than the diamond version","figures":"98 vs 93"}],"cons":[{"point":"Heavier than diamond","figures":"1.68 vs 1.02 ct"},{"point":"Less steady than in diamond when tipped","figures":"87 vs 93"}]},{"cut":"t105-round-brilliant","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/t105-round-brilliant","headline":"T105 Round Brilliant Cubic Zirconia: the T-series round with extra facets and more sparkle","summary":"Forty-eight extra facets on the T57 plan: in CZ they lift Scintillation to 90 against 80 for the T73, at the same Brilliance, 98.","scores_line":"Brilliance 98 · Fire 85 · Scintillation 90 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":93,"t73":93,"difference":0},"brilliance":{"value":98,"t73":98,"difference":0},"fire":{"value":85,"t73":87,"difference":-2},"scintillation":{"value":90,"t73":80,"difference":10},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":106,"t73":106,"difference":0},"tilt":{"value":87,"t73":87,"difference":0}},"pros":[{"point":"Finer sparkle than the T73","figures":"90 vs 80"},{"point":"More fire than the T105 in diamond","figures":"85 vs 77"},{"point":"More face per carat than the T73","figures":"106 vs 100"},{"point":"A little more light than in diamond","figures":"98 vs 95"}],"cons":[{"point":"Much heavier than diamond","figures":"1.51 vs 0.92 ct"}]},{"cut":"t73-round-brilliant","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/t73-round-brilliant","headline":"T73 Round Brilliant Cubic Zirconia: nearly all the light back, and more fire than the T73 in diamond","summary":"The modern round suits CZ unusually well: almost all the light comes back, and the face-up map shows no grey at all.","scores_line":"Brilliance 98 · Fire 87 · Scintillation 80 · in our census, where the T57 scores 98 · 87 · 72 in cubic zirconia","scores":{"global":{"value":93,"t73":92,"difference":1},"brilliance":{"value":98,"t73":98,"difference":0},"fire":{"value":87,"t73":87,"difference":0},"scintillation":{"value":80,"t73":72,"difference":8},"spread":{"value":100,"t73":101,"difference":-1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":106,"t73":105,"difference":1},"tilt":{"value":87,"t73":87,"difference":0}},"pros":[{"point":"More fire than the T73 in diamond","figures":"87 vs 78"},{"point":"A little more sparkle than the T57","figures":"80 vs 72"},{"point":"More light than in diamond","figures":"98 vs 93"}],"cons":[{"point":"Heavier than diamond for its size","figures":"1.66 vs 1.01 ct"},{"point":"A little less face for its weight than the T57","figures":"100 vs 107"},{"point":"Loses more light than diamond when tipped","figures":"87 vs 92"}]},{"cut":"t57-round-brilliant","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/t57-round-brilliant","headline":"T57 Round Brilliant Cubic Zirconia: the knife-edge round, with more light here than in diamond","summary":"The knife-edge T57 gives CZ all the light the T73 does. It gives less sparkle, because it has fewer facets.","scores_line":"Brilliance 98 · Fire 87 · Scintillation 72 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":92,"t73":93,"difference":-1},"brilliance":{"value":98,"t73":98,"difference":0},"fire":{"value":87,"t73":87,"difference":0},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":105,"t73":106,"difference":-1},"tilt":{"value":87,"t73":87,"difference":0}},"pros":[{"point":"More fire than the T57 in diamond","figures":"87 vs 79"},{"point":"More face for its weight than any round we measure","figures":"107 vs 100"},{"point":"More light than in diamond","figures":"98 vs 92"}],"cons":[{"point":"Heavier than diamond","figures":"1.51 vs 0.92 ct"},{"point":"Less sparkle than the T73","figures":"72 vs 80"},{"point":"A little less steady than in diamond","figures":"87 vs 90"}]},{"cut":"dg-anteros","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-anteros","headline":"DG-Anteros Cubic Zirconia: a T73-plan round with more fire than in diamond","summary":"In CZ, DG-Anteros returns Brilliance 92 against 98 for the T73, with more fire than the diamond version, 82 against 74.","scores_line":"Brilliance 92 · Fire 82 · Scintillation 80 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":89,"t73":93,"difference":-4},"brilliance":{"value":92,"t73":98,"difference":-6},"fire":{"value":82,"t73":87,"difference":-5},"scintillation":{"value":80,"t73":80,"difference":0},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":99,"t73":106,"difference":-7},"tilt":{"value":87,"t73":87,"difference":0}},"pros":[{"point":"More fire than DG-Anteros in diamond","figures":"82 vs 74"}],"cons":[{"point":"Heavier than diamond","figures":"1.60 vs 0.97 ct"},{"point":"Less light than the T73 in CZ","figures":"92 vs 98"},{"point":"More light out of the back","figures":"7 vs 1"}]},{"cut":"dg-m5","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-m5","headline":"DG-M5 Cubic Zirconia: a twelve-fold round with a little more sparkle","summary":"Twelve-fold and cut at a single pavilion angle, DG-M5 sparkles a little more than the T73 in CZ. It trails on fire, light and leakage.","scores_line":"Brilliance 91 · Fire 73 · Scintillation 85 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":87,"t73":93,"difference":-6},"brilliance":{"value":91,"t73":98,"difference":-7},"fire":{"value":73,"t73":87,"difference":-14},"scintillation":{"value":85,"t73":80,"difference":5},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":98,"t73":106,"difference":-8},"tilt":{"value":87,"t73":87,"difference":0}},"pros":[{"point":"A little more sparkle than the T73","figures":"85 vs 80"}],"cons":[{"point":"Much heavier than diamond","figures":"1.62 vs 0.98 ct"},{"point":"Much less fire than the T73 in CZ","figures":"73 vs 87"},{"point":"More light out of the back","figures":"9 vs 1"},{"point":"Less light than the T73 in CZ","figures":"91 vs 98"}]},{"cut":"cushion","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/cushion","headline":"Cushion Cut Cubic Zirconia: far more fire than a diamond cushion","summary":"In CZ the cushion matches the modern round's fire and beats the diamond cushion by a wide margin. It gives up a clear share of light to the T73.","scores_line":"Brilliance 88 · Fire 87 · Scintillation 85 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":88,"t73":93,"difference":-5},"brilliance":{"value":88,"t73":98,"difference":-10},"fire":{"value":87,"t73":87,"difference":0},"scintillation":{"value":85,"t73":80,"difference":5},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":97,"t73":100,"difference":-3},"shape_norm":{"value":102,"t73":106,"difference":-4},"tilt":{"value":85,"t73":87,"difference":-2}},"pros":[{"point":"Far more fire than a diamond cushion","figures":"87 vs 73"},{"point":"A little more sparkle than the T73","figures":"85 vs 80"}],"cons":[{"point":"Much heavier than a diamond cushion","figures":"2.09 vs 1.27 ct"},{"point":"Less light than the T73 in CZ","figures":"88 vs 98"},{"point":"Less steady than the diamond cushion","figures":"85 vs 92"},{"point":"Some light leaks through the back","figures":"7 vs 1"}]},{"cut":"portuguese-birds-nest","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/portuguese-birds-nest","headline":"Portuguese Bird's Nest Cut Cubic Zirconia: the highest sparkle we measure, shared with two of our rounds","summary":"177 interlocking facets give this cut Scintillation 98 in CZ, the highest we measure, shared with DG-Miliano and DG-Vitruvio. The light behind that sparkle falls well short of the T73's.","scores_line":"Brilliance 83 · Fire 79 · Scintillation 98 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":88,"t73":93,"difference":-5},"brilliance":{"value":83,"t73":98,"difference":-15},"fire":{"value":79,"t73":87,"difference":-8},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":90,"t73":106,"difference":-16},"tilt":{"value":100,"t73":87,"difference":13}},"pros":[{"point":"Sparkle level with the highest we measure","figures":"98 vs 80"},{"point":"More fire than the diamond version","figures":"79 vs 65"}],"cons":[{"point":"Heavy for its width","figures":"1.84 vs 1.11 ct"},{"point":"Much less light than the T73 in CZ","figures":"83 vs 98"},{"point":"About a sixth of the light leaks","figures":"16 vs 1"}]},{"cut":"trilliant","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/trilliant","headline":"Trilliant Cut Cubic Zirconia: more fire than a modern round, in three straight sides","summary":"Three straight sides and a lot of colour: in CZ the trilliant out-fires the diamond version and the modern round alike.","scores_line":"Brilliance 84 · Fire 94 · Scintillation 79 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":84,"t73":93,"difference":-9},"brilliance":{"value":84,"t73":98,"difference":-14},"fire":{"value":94,"t73":87,"difference":7},"scintillation":{"value":79,"t73":80,"difference":-1},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":62,"t73":100,"difference":-38},"shape_norm":{"value":97,"t73":106,"difference":-9},"tilt":{"value":88,"t73":87,"difference":1}},"pros":[{"point":"More fire than the diamond trilliant","figures":"94 vs 83"}],"cons":[{"point":"Heavier than diamond","figures":"1.58 vs 0.96 ct"},{"point":"A much less regular pavilion","figures":"62 vs 100"},{"point":"Less light than the T73 in CZ","figures":"84 vs 98"},{"point":"About a ninth of the light leaks","figures":"11 vs 1"}]},{"cut":"square","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/square","headline":"Square Cut Cubic Zirconia: more fire than the same square in diamond","summary":"A square brilliant in CZ: more colour than the diamond version and the same light, but well short of the T73's.","scores_line":"Brilliance 85 · Fire 83 · Scintillation 78 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":86,"t73":93,"difference":-7},"brilliance":{"value":85,"t73":98,"difference":-13},"fire":{"value":83,"t73":87,"difference":-4},"scintillation":{"value":78,"t73":80,"difference":-2},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":111,"t73":106,"difference":5},"tilt":{"value":88,"t73":87,"difference":1}},"pros":[{"point":"More fire than the diamond square","figures":"83 vs 72"}],"cons":[{"point":"Much heavier than diamond","figures":"1.88 vs 1.14 ct"},{"point":"Less light than the T73 in CZ","figures":"85 vs 98"},{"point":"Light lost through the pavilion","figures":"11 vs 1"}]},{"cut":"trillion","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/trillion","headline":"Trillion Cut Cubic Zirconia: more fire than a modern round, on three gently bowed sides","summary":"Shallow and three-sided, the trillion out-fires the T73 in CZ and shows the same face for its weight. About a quarter of the T73's light does not make it back.","scores_line":"Brilliance 73 · Fire 93 · Scintillation 80 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":84,"t73":93,"difference":-9},"brilliance":{"value":73,"t73":98,"difference":-25},"fire":{"value":93,"t73":87,"difference":6},"scintillation":{"value":80,"t73":80,"difference":0},"spread":{"value":107,"t73":100,"difference":7},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":85,"t73":106,"difference":-21},"tilt":{"value":90,"t73":87,"difference":3}},"pros":[{"point":"More fire than the T73 in CZ","figures":"93 vs 87"},{"point":"A little steadier than in diamond when tipped","figures":"90 vs 87"}],"cons":[{"point":"Heavier than diamond, but light for its width","figures":"1.31 vs 0.80 ct"},{"point":"Much less light than the T73 in CZ","figures":"73 vs 98"},{"point":"About a seventh of the light leaks","figures":"14 vs 1"}]},{"cut":"oval","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/oval","headline":"Oval Cut Cubic Zirconia: more fire than almost any cut we measure here","summary":"The oval turns a larger share of its returned light into colour than almost any other cut in CZ, and returns under two-thirds of the T73's light.","scores_line":"Brilliance 63 · Fire 96 · Scintillation 87 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":80,"t73":93,"difference":-13},"brilliance":{"value":63,"t73":98,"difference":-35},"fire":{"value":96,"t73":87,"difference":9},"scintillation":{"value":87,"t73":80,"difference":7},"spread":{"value":99,"t73":100,"difference":-1},"symmetry":{"value":98,"t73":100,"difference":-2},"shape_norm":{"value":74,"t73":106,"difference":-32},"tilt":{"value":77,"t73":87,"difference":-10}},"pros":[{"point":"More fire than the T73 in CZ","figures":"96 vs 87"},{"point":"More face for its weight than the T73","figures":"108 vs 100"},{"point":"More sparkle than the T73","figures":"87 vs 80"}],"cons":[{"point":"Heavy for its width","figures":"2.35 vs 1.42 ct"},{"point":"Much less light than the T73 in CZ","figures":"63 vs 98"},{"point":"Nearly a fifth of the light leaks","figures":"19 vs 1"},{"point":"Less steady than the diamond oval","figures":"77 vs 92"}]},{"cut":"dg-octagonal-kite","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-octagonal-kite","headline":"DG-Octagonal Kite Cubic Zirconia: more fire than in diamond, and the most light of any non-round cut here","summary":"An eight-fold kite design that works well in CZ: more fire than the diamond version and the most light of any non-round cut we measure here.","scores_line":"Brilliance 93 · Fire 92 · Scintillation 60 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":89,"t73":93,"difference":-4},"brilliance":{"value":93,"t73":98,"difference":-5},"fire":{"value":92,"t73":87,"difference":5},"scintillation":{"value":60,"t73":80,"difference":-20},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":108,"t73":106,"difference":2},"tilt":{"value":84,"t73":87,"difference":-3}},"pros":[{"point":"More fire than the diamond version","figures":"92 vs 82"}],"cons":[{"point":"Heavy: deep and dense","figures":"2.05 vs 1.25 ct"},{"point":"Much less sparkle than the T73","figures":"60 vs 80"},{"point":"A smaller face than the T73 for its weight","figures":"94 vs 100"},{"point":"A little less light than the T73 in CZ","figures":"93 vs 98"}]},{"cut":"marquise","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/marquise","headline":"Marquise Cut Cubic Zirconia: as much face for its weight as any cut we measure, and more fire than a round","summary":"Long and pointed, the marquise shows as much face per carat as any cut we measure, and out-fires and out-sparkles the T73 in CZ. It returns about two-thirds of the T73's light.","scores_line":"Brilliance 66 · Fire 93 · Scintillation 86 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":80,"t73":93,"difference":-13},"brilliance":{"value":66,"t73":98,"difference":-32},"fire":{"value":93,"t73":87,"difference":6},"scintillation":{"value":86,"t73":80,"difference":6},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":94,"t73":100,"difference":-6},"shape_norm":{"value":77,"t73":106,"difference":-29},"tilt":{"value":80,"t73":87,"difference":-7}},"pros":[{"point":"As much face for its weight as any cut we measure","figures":"121 vs 100"},{"point":"More fire than the T73 in CZ","figures":"93 vs 87"},{"point":"More sparkle than the T73","figures":"86 vs 80"}],"cons":[{"point":"Heavy for its width","figures":"3.45 vs 2.09 ct"},{"point":"A third less light than the T73 in CZ","figures":"66 vs 98"},{"point":"A fifth of the light leaks","figures":"20 vs 1"},{"point":"Loses more light when tipped","figures":"80 vs 87"}]},{"cut":"asscher","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/asscher","headline":"Asscher Cut Cubic Zirconia: more fire than a diamond Asscher","summary":"Square steps and cropped corners in CZ: more colourful than in diamond, about a round's face for its weight, and a fifth of its face grey head-on.","scores_line":"Brilliance 74 · Fire 88 · Scintillation 72 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":81,"t73":93,"difference":-12},"brilliance":{"value":74,"t73":98,"difference":-24},"fire":{"value":88,"t73":87,"difference":1},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":107,"t73":100,"difference":7},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":97,"t73":106,"difference":-9},"tilt":{"value":77,"t73":87,"difference":-10}},"pros":[{"point":"More fire than the diamond Asscher","figures":"88 vs 80"}],"cons":[{"point":"Heavier than diamond","figures":"2.22 vs 1.34 ct"},{"point":"Much less light than the T73 in CZ","figures":"74 vs 98"},{"point":"Light leaks from the start","figures":"15 vs 1"},{"point":"Loses more light when tipped","figures":"77 vs 87"}]},{"cut":"princess","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/princess","headline":"Princess Cut Cubic Zirconia: more fire than a diamond princess","summary":"Sharp corners and chevron pavilion facets: in CZ the princess throws more colour than the diamond version, and returns under two-thirds of the T73's light.","scores_line":"Brilliance 63 · Fire 92 · Scintillation 78 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":79,"t73":93,"difference":-14},"brilliance":{"value":63,"t73":98,"difference":-35},"fire":{"value":92,"t73":87,"difference":5},"scintillation":{"value":78,"t73":80,"difference":-2},"spread":{"value":95,"t73":100,"difference":-5},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":99,"t73":106,"difference":-7},"tilt":{"value":85,"t73":87,"difference":-2}},"pros":[{"point":"More fire than the diamond princess","figures":"92 vs 83"}],"cons":[{"point":"About two-thirds heavier than a diamond princess","figures":"2.44 vs 1.48 ct"},{"point":"Much less light than the T73 in CZ","figures":"63 vs 98"},{"point":"More than a fifth of the light leaks","figures":"22 vs 1"},{"point":"A little less steady than the diamond princess","figures":"85 vs 89"}]},{"cut":"dg-vitruvio","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/dg-vitruvio","headline":"DG-Vitruvio Ruby: the T73's light, broken into far finer sparkle","summary":"Same Brilliance as the T73 in ruby, 94, and Scintillation 98 against 80: DG-Vitruvio spends its extra facets on the girdle.","scores_line":"Brilliance 94 · Fire 37 · Scintillation 98 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":81,"t73":79,"difference":2},"brilliance":{"value":94,"t73":94,"difference":0},"fire":{"value":37,"t73":37,"difference":0},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":101,"t73":102,"difference":-1},"tilt":{"value":75,"t73":75,"difference":0}},"pros":[{"point":"Much finer sparkle than the T73","figures":"98 vs 80"}],"cons":[{"point":"Less than half the fire of the diamond version","figures":"37 vs 79"},{"point":"Keeps less light when tipped than in diamond","figures":"75 vs 93"},{"point":"Heavier than a diamond of the same size","figures":"1.16 vs 1.02 ct"},{"point":"A few points more leakage than in diamond","figures":"6 vs 2"}]},{"cut":"dg-m5","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/dg-m5","headline":"DG-M5 Ruby: the most light we measure in this stone, and no leakage","summary":"A twelve-fold round turns out to be the best light-returner we measure in ruby: Brilliance 100, with nothing escaping through the pavilion.","scores_line":"Brilliance 100 · Fire 39 · Scintillation 85 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":82,"t73":79,"difference":3},"brilliance":{"value":100,"t73":94,"difference":6},"fire":{"value":39,"t73":37,"difference":2},"scintillation":{"value":85,"t73":80,"difference":5},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":107,"t73":102,"difference":5},"tilt":{"value":76,"t73":75,"difference":1}},"pros":[{"point":"More light than any other cut we measure in ruby","figures":"100 vs 94"},{"point":"A little more sparkle than the T73","figures":"85 vs 80"},{"point":"Nothing lost through the back","figures":"0 vs 5"}],"cons":[{"point":"Much less fire than the diamond version","figures":"39 vs 67"},{"point":"Heavier than a diamond of the same width","figures":"1.12 vs 0.98 ct"},{"point":"Holds less of its light at an angle than in diamond","figures":"76 vs 83"}]},{"cut":"dg-miliano","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/dg-miliano","headline":"DG-Miliano Ruby: sparkle as fine as any we measure in this stone, and steadier light than the T73 when tilted","summary":"A 177-facet round that sparkles as finely as anything we measure in ruby, and darkens less than the T73 when it rocks.","scores_line":"Brilliance 90 · Fire 35 · Scintillation 98 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":80,"t73":79,"difference":1},"brilliance":{"value":90,"t73":94,"difference":-4},"fire":{"value":35,"t73":37,"difference":-2},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":96,"t73":102,"difference":-6},"tilt":{"value":83,"t73":75,"difference":8}},"pros":[{"point":"Tied for the finest sparkle we measure in ruby","figures":"98 vs 80"},{"point":"Keeps more light than the T73 when tipped","figures":"83 vs 75"}],"cons":[{"point":"Less than half the diamond version's fire","figures":"35 vs 82"},{"point":"Weighs more than diamond for its size","figures":"1.17 vs 1.03 ct"},{"point":"More leakage than in diamond","figures":"10 vs 3"},{"point":"A little less light than the diamond version","figures":"90 vs 95"}]},{"cut":"dg-anteros","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/dg-anteros","headline":"DG-Anteros Ruby: a little more light than the T73, from the same 73-facet plan","summary":"Measured in ruby, DG-Anteros still returns a little more light than the T73, from the same 73-facet plan.","scores_line":"Brilliance 97 · Fire 43 · Scintillation 80 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":82,"t73":79,"difference":3},"brilliance":{"value":97,"t73":94,"difference":3},"fire":{"value":43,"t73":37,"difference":6},"scintillation":{"value":80,"t73":80,"difference":0},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":104,"t73":102,"difference":2},"tilt":{"value":78,"t73":75,"difference":3}},"pros":[{"point":"A little more light than the T73 in ruby","figures":"97 vs 94"}],"cons":[{"point":"Far less fire than in diamond","figures":"43 vs 74"},{"point":"Heavier than the diamond version","figures":"1.10 vs 0.97 ct"},{"point":"Loses more light when rocked than the diamond","figures":"78 vs 85"}]},{"cut":"t105-round-brilliant","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/t105-round-brilliant","headline":"T105 Round Brilliant Ruby: more sparkle than the T73, on a knife-edge girdle","summary":"The T57 with 48 extra facets and no girdle band: finer sparkle in ruby than the T73, and a few points less light.","scores_line":"Brilliance 90 · Fire 36 · Scintillation 90 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":78,"t73":79,"difference":-1},"brilliance":{"value":90,"t73":94,"difference":-4},"fire":{"value":36,"t73":37,"difference":-1},"scintillation":{"value":90,"t73":80,"difference":10},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":97,"t73":102,"difference":-5},"tilt":{"value":78,"t73":75,"difference":3}},"pros":[{"point":"Finer sparkle than the T73","figures":"90 vs 80"},{"point":"More face per carat than the T73","figures":"106 vs 100"}],"cons":[{"point":"Under half the fire of a diamond T105","figures":"36 vs 77"},{"point":"Heavier than the same size in diamond","figures":"1.04 vs 0.92 ct"},{"point":"Darkens more when tipped than in diamond","figures":"78 vs 87"},{"point":"Far more leakage than in diamond","figures":"10 vs 1"}]},{"cut":"t73-round-brilliant","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/t73-round-brilliant","headline":"T73 Round Brilliant Ruby: the benchmark round, with more sparkle than the T57","summary":"Our benchmark round, in ruby. Against the T57, it scores Scintillation 80 to 72 at the same Brilliance, 94, and a Face-up size of 100 to 107.","scores_line":"Brilliance 94 · Fire 37 · Scintillation 80 · in our census, where the T57 scores 94 · 39 · 72 in ruby","scores":{"global":{"value":79,"t73":78,"difference":1},"brilliance":{"value":94,"t73":94,"difference":0},"fire":{"value":37,"t73":39,"difference":-2},"scintillation":{"value":80,"t73":72,"difference":8},"spread":{"value":100,"t73":101,"difference":-1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":102,"t73":101,"difference":1},"tilt":{"value":75,"t73":74,"difference":1}},"pros":[{"point":"More sparkle than the T57","figures":"80 vs 72"}],"cons":[{"point":"Far less fire than a diamond T73","figures":"37 vs 78"},{"point":"Holds less light at an angle than in diamond","figures":"75 vs 92"},{"point":"Heavier than diamond","figures":"1.15 vs 1.01 ct"},{"point":"Less face for its weight than the T57","figures":"100 vs 107"}]},{"cut":"dg-rafaello","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/dg-rafaello","headline":"DG-Rafaello Ruby: a five-tier pavilion that keeps its fine sparkle","summary":"A twelve-fold round on a curved, five-tier pavilion. Its fine sparkle and a little extra face per carat survive the move to ruby; its light and fire fall further from the diamond figures than on any of our other DG and T-series rounds.","scores_line":"Brilliance 85 · Fire 25 · Scintillation 96 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":75,"t73":79,"difference":-4},"brilliance":{"value":85,"t73":94,"difference":-9},"fire":{"value":25,"t73":37,"difference":-12},"scintillation":{"value":96,"t73":80,"difference":16},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":92,"t73":102,"difference":-10},"tilt":{"value":81,"t73":75,"difference":6}},"pros":[{"point":"Much finer sparkle than the T73","figures":"96 vs 80"},{"point":"A slightly wider face for its weight","figures":"106 vs 100"}],"cons":[{"point":"The least fire of our DG and T-series rounds","figures":"25 vs 80"},{"point":"Keeps less light when tilted than the diamond","figures":"81 vs 97"},{"point":"Heavier than in diamond","figures":"1.07 vs 0.94 ct"},{"point":"More leakage than the T73","figures":"15 vs 5"}]},{"cut":"t57-round-brilliant","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/t57-round-brilliant","headline":"T57 Round Brilliant Ruby: the most face for its weight of any round we measure","summary":"The 57-facet round, with a knife-edge girdle. In ruby it returns as much light as the T73, shows a little more face for its weight, and sparkles a little less.","scores_line":"Brilliance 94 · Fire 39 · Scintillation 72 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":78,"t73":79,"difference":-1},"brilliance":{"value":94,"t73":94,"difference":0},"fire":{"value":39,"t73":37,"difference":2},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":101,"t73":102,"difference":-1},"tilt":{"value":74,"t73":75,"difference":-1}},"pros":[{"point":"The most face for its weight of our rounds","figures":"107 vs 100"}],"cons":[{"point":"Far less fire than the diamond T57","figures":"39 vs 79"},{"point":"Keeps less light when tilted than in diamond","figures":"74 vs 90"},{"point":"Heavier than a diamond of the same width","figures":"1.04 vs 0.92 ct"},{"point":"Less sparkle than the T73","figures":"72 vs 80"}]},{"cut":"old-european","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/old-european","headline":"Old European Cut Ruby: a small-table round that lets more than a fifth of its light leak","summary":"A 45.0% table and a 35.0° crown on a round outline: in ruby 22% of the light leaks, more than from any of our DG or T-series rounds.","scores_line":"Brilliance 78 · Fire 39 · Scintillation 81 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":74,"t73":79,"difference":-5},"brilliance":{"value":78,"t73":94,"difference":-16},"fire":{"value":39,"t73":37,"difference":2},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":122,"t73":102,"difference":20},"tilt":{"value":87,"t73":75,"difference":12}},"pros":[],"cons":[{"point":"Far less fire than the diamond version","figures":"39 vs 74"},{"point":"More than a fifth of the light leaks","figures":"22 vs 5"},{"point":"Less light than a modern ruby round","figures":"78 vs 94"},{"point":"Heavier than diamond","figures":"1.24 vs 1.09 ct"}]},{"cut":"old-single","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/old-single","headline":"Old Single Cut Ruby: a simple eight cut that lets half the light through","summary":"A table, one ring of crown facets and one ring of pavilion mains: in ruby, more than half the light in our census leaves through the back.","scores_line":"Brilliance 36 · Fire 9 · Scintillation 44 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":49,"t73":79,"difference":-30},"brilliance":{"value":36,"t73":94,"difference":-58},"fire":{"value":9,"t73":37,"difference":-28},"scintillation":{"value":44,"t73":80,"difference":-36},"spread":{"value":97,"t73":100,"difference":-3},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":39,"t73":102,"difference":-63},"tilt":{"value":100,"t73":75,"difference":25}},"pros":[],"cons":[{"point":"Almost no fire at all","figures":"9 vs 84"},{"point":"Little light back through the crown","figures":"36 vs 94"},{"point":"More than half the light leaks","figures":"54 vs 5"},{"point":"Slow, sparse flashes","figures":"44 vs 80"}]},{"cut":"oval","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/oval","headline":"Oval Cut Ruby: twice the T73's fire, from the same material","summary":"In our census the oval shows the most fire of any ruby cut: Fire 74, twice the T73's 37.","scores_line":"Brilliance 66 · Fire 74 · Scintillation 87 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":73,"t73":79,"difference":-6},"brilliance":{"value":66,"t73":94,"difference":-28},"fire":{"value":74,"t73":37,"difference":37},"scintillation":{"value":87,"t73":80,"difference":7},"spread":{"value":99,"t73":100,"difference":-1},"symmetry":{"value":98,"t73":100,"difference":-2},"shape_norm":{"value":77,"t73":102,"difference":-25},"tilt":{"value":58,"t73":75,"difference":-17}},"pros":[{"point":"The most fire we measure in ruby","figures":"74 vs 37"},{"point":"More face for its weight than a round","figures":"108 vs 100"},{"point":"A little more sparkle than the T73","figures":"87 vs 80"}],"cons":[{"point":"Darkens much more than a diamond oval when tilted","figures":"58 vs 92"},{"point":"Less light than a round ruby","figures":"66 vs 94"},{"point":"A quarter of the light leaks","figures":"26 vs 5"},{"point":"Heavier than a diamond oval","figures":"1.62 vs 1.42 ct"}]},{"cut":"trilliant","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/trilliant","headline":"Trilliant Cut Ruby: brighter than the diamond version, short of the round","summary":"Straight sides and sharp corners: in ruby the trilliant stays fairly bright, though by our margins none of its scores lands as a pro.","scores_line":"Brilliance 86 · Fire 52 · Scintillation 79 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":74,"t73":79,"difference":-5},"brilliance":{"value":86,"t73":94,"difference":-8},"fire":{"value":52,"t73":37,"difference":15},"scintillation":{"value":79,"t73":80,"difference":-1},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":62,"t73":100,"difference":-38},"shape_norm":{"value":100,"t73":102,"difference":-2},"tilt":{"value":75,"t73":75,"difference":0}},"pros":[],"cons":[{"point":"A less even pavilion than a round","figures":"62 vs 100"},{"point":"Less fire than a diamond trilliant","figures":"52 vs 83"},{"point":"Holds less light at an angle than in diamond","figures":"75 vs 89"},{"point":"Heavier than a diamond trilliant","figures":"1.09 vs 0.96 ct"}]},{"cut":"trillion","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/trillion","headline":"Trillion Cut Ruby: a curved-sided triangle that trails the round on light","summary":"Curved sides and a shallow pavilion: in ruby the trillion matches the T73's face for its weight, and lets more light through.","scores_line":"Brilliance 72 · Fire 59 · Scintillation 80 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":76,"t73":79,"difference":-3},"brilliance":{"value":72,"t73":94,"difference":-22},"fire":{"value":59,"t73":37,"difference":22},"scintillation":{"value":80,"t73":80,"difference":0},"spread":{"value":107,"t73":100,"difference":7},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":83,"t73":102,"difference":-19},"tilt":{"value":87,"t73":75,"difference":12}},"pros":[],"cons":[{"point":"Less fire than a diamond trillion","figures":"59 vs 87"},{"point":"Less light than a round ruby","figures":"72 vs 94"},{"point":"Heavier than the diamond version","figures":"0.91 vs 0.80 ct"},{"point":"More leakage than the T73","figures":"17 vs 5"}]},{"cut":"cushion","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/cushion","headline":"Cushion Cut Ruby: more light than a diamond cushion, and fine sparkle","summary":"In our census the cushion is the brightest non-round ruby we measure: Brilliance 88, ahead of 80 for the same cushion in diamond.","scores_line":"Brilliance 88 · Fire 36 · Scintillation 85 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":76,"t73":79,"difference":-3},"brilliance":{"value":88,"t73":94,"difference":-6},"fire":{"value":36,"t73":37,"difference":-1},"scintillation":{"value":85,"t73":80,"difference":5},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":97,"t73":100,"difference":-3},"shape_norm":{"value":103,"t73":102,"difference":1},"tilt":{"value":72,"t73":75,"difference":-3}},"pros":[{"point":"More light than a diamond cushion","figures":"88 vs 80"},{"point":"A little more sparkle than the T73","figures":"85 vs 80"}],"cons":[{"point":"Much less fire than a diamond cushion","figures":"36 vs 73"},{"point":"Holds less light when tilted","figures":"72 vs 92"},{"point":"Deep and dense","figures":"1.44 vs 1.27 ct"},{"point":"A little more leakage than a round","figures":"11 vs 5"}]},{"cut":"teardrop","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/teardrop","headline":"Teardrop Cut Ruby: much more fire than a round, in a gentle drop","summary":"A pear with a fuller shoulder: in ruby the teardrop gains plenty of fire over a round and gives up a lot of light.","scores_line":"Brilliance 59 · Fire 64 · Scintillation 81 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":67,"t73":79,"difference":-12},"brilliance":{"value":59,"t73":94,"difference":-35},"fire":{"value":64,"t73":37,"difference":27},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":98,"t73":100,"difference":-2},"shape_norm":{"value":69,"t73":102,"difference":-33},"tilt":{"value":52,"t73":75,"difference":-23}},"pros":[{"point":"Far more fire than a round ruby","figures":"64 vs 37"},{"point":"A much larger face for its weight","figures":"116 vs 100"}],"cons":[{"point":"Much less light than a round","figures":"59 vs 94"},{"point":"Darkens quickly when tilted","figures":"52 vs 80"},{"point":"Nearly a quarter of the light leaks","figures":"23 vs 5"},{"point":"Heavier than diamond","figures":"1.46 vs 1.28 ct"}]},{"cut":"square","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/square","headline":"Square Cut Ruby: a steady square face that starts with less light","summary":"The square counterpart of the round brilliant: in ruby it keeps its light steady when tilted, but starts with less of it.","scores_line":"Brilliance 78 · Fire 45 · Scintillation 78 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":75,"t73":79,"difference":-4},"brilliance":{"value":78,"t73":94,"difference":-16},"fire":{"value":45,"t73":37,"difference":8},"scintillation":{"value":78,"t73":80,"difference":-2},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":102,"t73":102,"difference":0},"tilt":{"value":84,"t73":75,"difference":9}},"pros":[],"cons":[{"point":"Less fire than a diamond square","figures":"45 vs 72"},{"point":"Less light than a round ruby","figures":"78 vs 94"},{"point":"Heavier than diamond for its size","figures":"1.30 vs 1.14 ct"},{"point":"More light lost than through a round","figures":"16 vs 5"}]},{"cut":"princess","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/princess","headline":"Princess Cut Ruby: pointed square corners, and more than a quarter of the light lost","summary":"Sharp corners and chevron pavilion facets: in ruby the princess returns more light than in diamond, 68 against 57, yet 27% of the light leaks through the pavilion.","scores_line":"Brilliance 68 · Fire 52 · Scintillation 78 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":71,"t73":79,"difference":-8},"brilliance":{"value":68,"t73":94,"difference":-26},"fire":{"value":52,"t73":37,"difference":15},"scintillation":{"value":78,"t73":80,"difference":-2},"spread":{"value":95,"t73":100,"difference":-5},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":106,"t73":102,"difference":4},"tilt":{"value":76,"t73":75,"difference":1}},"pros":[],"cons":[{"point":"Less fire than a diamond princess","figures":"52 vs 83"},{"point":"Much less light than a round ruby","figures":"68 vs 94"},{"point":"More than a quarter of the light leaks","figures":"27 vs 5"},{"point":"Heavier than a diamond princess","figures":"1.68 vs 1.48 ct"}]},{"cut":"emerald-square","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/emerald-square","headline":"Emerald Square Cut Ruby: a step-cut square that holds its light when tilted","summary":"Concentric steps on a square: in ruby this step cut holds its light when tilted better than the diamond version does, though it returns far less light than a round.","scores_line":"Brilliance 71 · Fire 53 · Scintillation 72 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":73,"t73":79,"difference":-6},"brilliance":{"value":71,"t73":94,"difference":-23},"fire":{"value":53,"t73":37,"difference":16},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":108,"t73":100,"difference":8},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":94,"t73":102,"difference":-8},"tilt":{"value":86,"t73":75,"difference":11}},"pros":[{"point":"Holds its light better than a diamond emerald square","figures":"86 vs 79"}],"cons":[{"point":"Less fire than in diamond","figures":"53 vs 84"},{"point":"Less light than a round ruby","figures":"71 vs 94"},{"point":"Over a fifth of the light leaks","figures":"22 vs 5"},{"point":"Heavier than diamond","figures":"1.66 vs 1.46 ct"}]},{"cut":"marquise","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/marquise","headline":"Marquise Cut Ruby: about a fifth more face per carat than a round","summary":"Pointed at both ends, the marquise lays a carat of ruby over about a fifth more area than a round, and sparkles a little more. It also lets nearly two-fifths of its light out.","scores_line":"Brilliance 55 · Fire 54 · Scintillation 86 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":63,"t73":79,"difference":-16},"brilliance":{"value":55,"t73":94,"difference":-39},"fire":{"value":54,"t73":37,"difference":17},"scintillation":{"value":86,"t73":80,"difference":6},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":94,"t73":100,"difference":-6},"shape_norm":{"value":64,"t73":102,"difference":-38},"tilt":{"value":56,"t73":75,"difference":-19}},"pros":[{"point":"As much face for its weight as any cut we measure","figures":"121 vs 100"},{"point":"A little more sparkle than a round","figures":"86 vs 80"}],"cons":[{"point":"Much less light than a round ruby","figures":"55 vs 94"},{"point":"Less fire than a diamond marquise","figures":"54 vs 89"},{"point":"Nearly two-fifths of the light leaks","figures":"39 vs 5"},{"point":"Loses much of its light at an angle","figures":"56 vs 87"}]},{"cut":"pear","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/pear","headline":"Pear Cut Ruby: more face for its weight than a round, in a drop outline","summary":"One rounded end and one point: in our census the pear shows a Face-up size of 115 to a round's 100, while returning about a third less light.","scores_line":"Brilliance 62 · Fire 56 · Scintillation 76 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":65,"t73":79,"difference":-14},"brilliance":{"value":62,"t73":94,"difference":-32},"fire":{"value":56,"t73":37,"difference":19},"scintillation":{"value":76,"t73":80,"difference":-4},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":85,"t73":100,"difference":-15},"shape_norm":{"value":72,"t73":102,"difference":-30},"tilt":{"value":55,"t73":75,"difference":-20}},"pros":[{"point":"A larger face for its weight than a round","figures":"115 vs 100"}],"cons":[{"point":"A third less light than a round ruby","figures":"62 vs 94"},{"point":"Less fire than a diamond pear","figures":"56 vs 84"},{"point":"Loses light fast when it tips","figures":"55 vs 80"},{"point":"About a quarter of the light leaks","figures":"26 vs 5"}]},{"cut":"dg-vitruvio","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/dg-vitruvio","headline":"DG-Vitruvio Sapphire: the T73's light, with far more sparkle","summary":"The T73's crown and pavilion with a 96-facet girdle: in sapphire that buys sparkle, and leaves the light exactly where the round has it.","scores_line":"Brilliance 94 · Fire 37 · Scintillation 98 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":81,"t73":79,"difference":2},"brilliance":{"value":94,"t73":94,"difference":0},"fire":{"value":37,"t73":37,"difference":0},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":101,"t73":102,"difference":-1},"tilt":{"value":75,"t73":75,"difference":0}},"pros":[{"point":"Far more flashes than the T73","figures":"98 vs 80"}],"cons":[{"point":"Under half the diamond version's fire","figures":"37 vs 79"},{"point":"Lets light go sooner when tipped","figures":"75 vs 93"},{"point":"Heavier than a diamond of the same width","figures":"1.16 vs 1.02 ct"},{"point":"A little more leakage than in diamond","figures":"6 vs 2"}]},{"cut":"dg-m5","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/dg-m5","headline":"DG-M5 Sapphire: the most light of any cut we measure in this stone","summary":"A twelve-fold round with a single pavilion angle, and in sapphire the top of our light scale: Brilliance 100, with 0% leaking out.","scores_line":"Brilliance 100 · Fire 39 · Scintillation 85 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":82,"t73":79,"difference":3},"brilliance":{"value":100,"t73":94,"difference":6},"fire":{"value":39,"t73":37,"difference":2},"scintillation":{"value":85,"t73":80,"difference":5},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":107,"t73":102,"difference":5},"tilt":{"value":76,"t73":75,"difference":1}},"pros":[{"point":"The most light of any sapphire cut we measure","figures":"100 vs 94"},{"point":"More sparkle than the T73","figures":"85 vs 80"},{"point":"Practically no leakage","figures":"0 vs 5"}],"cons":[{"point":"Fire well under the diamond version","figures":"39 vs 67"},{"point":"Heavier than diamond for its width","figures":"1.12 vs 0.98 ct"},{"point":"Holds a little less light when tipped than in diamond","figures":"76 vs 83"}]},{"cut":"dg-miliano","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/dg-miliano","headline":"DG-Miliano Sapphire: joint-top sparkle in this stone, and more light kept as it tips","summary":"Three pavilion tiers and a 96-facet girdle: in sapphire, DG-Miliano returns a few points less face-up light than the T73, with more sparkle and a steadier face as the stone moves.","scores_line":"Brilliance 90 · Fire 35 · Scintillation 98 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":80,"t73":79,"difference":1},"brilliance":{"value":90,"t73":94,"difference":-4},"fire":{"value":35,"t73":37,"difference":-2},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":96,"t73":102,"difference":-6},"tilt":{"value":83,"t73":75,"difference":8}},"pros":[{"point":"Among the finest sparkle we measure in sapphire","figures":"98 vs 80"},{"point":"Keeps more light than the T73 when tipped","figures":"83 vs 75"}],"cons":[{"point":"Fire falls further than on most of our rounds","figures":"35 vs 82"},{"point":"Heavier than the diamond version","figures":"1.17 vs 1.03 ct"},{"point":"More leakage than in diamond","figures":"10 vs 3"},{"point":"A few points less light than in diamond","figures":"90 vs 95"}]},{"cut":"dg-anteros","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/dg-anteros","headline":"DG-Anteros Sapphire: more light than the T73 from the same 73 facets","summary":"Measured in sapphire, DG-Anteros keeps the T73's 73 facets and gets more light back out of them.","scores_line":"Brilliance 97 · Fire 43 · Scintillation 80 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":82,"t73":79,"difference":3},"brilliance":{"value":97,"t73":94,"difference":3},"fire":{"value":43,"t73":37,"difference":6},"scintillation":{"value":80,"t73":80,"difference":0},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":104,"t73":102,"difference":2},"tilt":{"value":78,"t73":75,"difference":3}},"pros":[{"point":"More light than the T73 in sapphire","figures":"97 vs 94"}],"cons":[{"point":"Fire still far below the diamond version","figures":"43 vs 74"},{"point":"Weighs more than diamond","figures":"1.10 vs 0.97 ct"},{"point":"Keeps less light when tipped than in diamond","figures":"78 vs 85"}]},{"cut":"t105-round-brilliant","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/t105-round-brilliant","headline":"T105 Round Brilliant Sapphire: 32 more facets than the T73, and more sparkle","summary":"The T-series plan with three rows of lower halves and no girdle band: in sapphire, Scintillation 90 against the T73's 80, Face-up size 106 against 100, and 10% leakage against 5%.","scores_line":"Brilliance 90 · Fire 36 · Scintillation 90 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":78,"t73":79,"difference":-1},"brilliance":{"value":90,"t73":94,"difference":-4},"fire":{"value":36,"t73":37,"difference":-1},"scintillation":{"value":90,"t73":80,"difference":10},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":97,"t73":102,"difference":-5},"tilt":{"value":78,"t73":75,"difference":3}},"pros":[{"point":"More sparkle than the T73","figures":"90 vs 80"},{"point":"More face for its weight than the T73","figures":"106 vs 100"}],"cons":[{"point":"Fire at under half the diamond figure","figures":"36 vs 77"},{"point":"Heavier than a diamond of its size","figures":"1.04 vs 0.92 ct"},{"point":"Less light kept when tipped than in diamond","figures":"78 vs 87"},{"point":"Twice the T73's leakage","figures":"10 vs 1"}]},{"cut":"t73-round-brilliant","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/t73-round-brilliant","headline":"T73 Round Brilliant Sapphire: the benchmark round, with more sparkle than the T57","summary":"Our benchmark round, measured in sapphire: Brilliance 94, level with the T57, Scintillation 80 against 72, and Fire 37 against 78 for the same cut in diamond.","scores_line":"Brilliance 94 · Fire 37 · Scintillation 80 · in our census, where the T57 scores 94 · 39 · 72 in sapphire","scores":{"global":{"value":79,"t73":78,"difference":1},"brilliance":{"value":94,"t73":94,"difference":0},"fire":{"value":37,"t73":39,"difference":-2},"scintillation":{"value":80,"t73":72,"difference":8},"spread":{"value":100,"t73":101,"difference":-1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":102,"t73":101,"difference":1},"tilt":{"value":75,"t73":74,"difference":1}},"pros":[{"point":"More sparkle than the T57","figures":"80 vs 72"}],"cons":[{"point":"A fraction of the diamond's fire","figures":"37 vs 78"},{"point":"Loses light quickly once tipped","figures":"75 vs 92"},{"point":"Heavier than diamond at every size","figures":"1.15 vs 1.01 ct"},{"point":"Less face for its weight than the T57","figures":"100 vs 107"}]},{"cut":"dg-rafaello","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/dg-rafaello","headline":"DG-Rafaello Sapphire: a five-tier pavilion that sparkles far above the T73","summary":"DG-Rafaello brings its sparkle and a slightly larger face for its weight to sapphire, and gives up fire and some light: the least fire of our house and T-series rounds, and more light out of the back.","scores_line":"Brilliance 85 · Fire 25 · Scintillation 96 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":75,"t73":79,"difference":-4},"brilliance":{"value":85,"t73":94,"difference":-9},"fire":{"value":25,"t73":37,"difference":-12},"scintillation":{"value":96,"t73":80,"difference":16},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":92,"t73":102,"difference":-10},"tilt":{"value":81,"t73":75,"difference":6}},"pros":[{"point":"Much more sparkle than the T73","figures":"96 vs 80"},{"point":"A little more face for its weight than the T73","figures":"106 vs 100"}],"cons":[{"point":"The least fire of our house and T-series rounds in sapphire","figures":"25 vs 80"},{"point":"Holds its light less well than in diamond","figures":"81 vs 97"},{"point":"Heavier than diamond","figures":"1.07 vs 0.94 ct"},{"point":"Three times the T73's leakage","figures":"15 vs 5"}]},{"cut":"t57-round-brilliant","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/t57-round-brilliant","headline":"T57 Round Brilliant Sapphire: more face per carat than any other round we measure","summary":"The 57-facet plan, cut in sapphire: Brilliance 94, level with the T73, Face-up size 107 against 100, and Scintillation 72 against 80.","scores_line":"Brilliance 94 · Fire 39 · Scintillation 72 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":78,"t73":79,"difference":-1},"brilliance":{"value":94,"t73":94,"difference":0},"fire":{"value":39,"t73":37,"difference":2},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":101,"t73":102,"difference":-1},"tilt":{"value":74,"t73":75,"difference":-1}},"pros":[{"point":"The widest face per carat of any round we measure","figures":"107 vs 100"}],"cons":[{"point":"Half the fire of the diamond T57","figures":"39 vs 79"},{"point":"Gives up more light when tipped","figures":"74 vs 90"},{"point":"Heavier than diamond for the size","figures":"1.04 vs 0.92 ct"},{"point":"Fewer flashes than the T73","figures":"72 vs 80"}]},{"cut":"oval","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/oval","headline":"Oval Cut Sapphire: twice the round's fire, the most we measure in this stone","summary":"In sapphire the oval scores 74 for fire, twice the T73's 37 and more than any round we measure. It also returns less face-up light, 66, and keeps 58 of it tipped 20°.","scores_line":"Brilliance 66 · Fire 74 · Scintillation 87 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":73,"t73":79,"difference":-6},"brilliance":{"value":66,"t73":94,"difference":-28},"fire":{"value":74,"t73":37,"difference":37},"scintillation":{"value":87,"t73":80,"difference":7},"spread":{"value":99,"t73":100,"difference":-1},"symmetry":{"value":98,"t73":100,"difference":-2},"shape_norm":{"value":77,"t73":102,"difference":-25},"tilt":{"value":58,"t73":75,"difference":-17}},"pros":[{"point":"The most fire we measure in sapphire","figures":"74 vs 37"},{"point":"More face for its weight than the T73","figures":"108 vs 100"},{"point":"A little more sparkle than the T73","figures":"87 vs 80"}],"cons":[{"point":"Darkens quickly when tipped","figures":"58 vs 92"},{"point":"Less light than the T73","figures":"66 vs 94"},{"point":"A quarter of the light leaks","figures":"26 vs 5"},{"point":"Heavier than a diamond oval","figures":"1.62 vs 1.42 ct"}]},{"cut":"trilliant","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/trilliant","headline":"Trilliant Cut Sapphire: straight sides and sharp corners, with most of a round's light","summary":"Straight-sided and sharp-cornered, the trilliant keeps most of a round's light in sapphire. It wins on nothing we count, and its pavilion is one of the least regular we measure.","scores_line":"Brilliance 86 · Fire 52 · Scintillation 79 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":74,"t73":79,"difference":-5},"brilliance":{"value":86,"t73":94,"difference":-8},"fire":{"value":52,"t73":37,"difference":15},"scintillation":{"value":79,"t73":80,"difference":-1},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":62,"t73":100,"difference":-38},"shape_norm":{"value":100,"t73":102,"difference":-2},"tilt":{"value":75,"t73":75,"difference":0}},"pros":[],"cons":[{"point":"One of the least regular pavilions we measure","figures":"62 vs 100"},{"point":"Fire well below the diamond trilliant","figures":"52 vs 83"},{"point":"Keeps less light at an angle than in diamond","figures":"75 vs 89"},{"point":"Heavier than a diamond trilliant","figures":"1.09 vs 0.96 ct"}]},{"cut":"trillion","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/trillion","headline":"Trillion Cut Sapphire: a curved triangle with a round's face per carat, and less light","summary":"A shallow, curved-sided triangle: in sapphire it shows as much face for its weight as a round, no more, and lets over three times as much light out of the back.","scores_line":"Brilliance 72 · Fire 59 · Scintillation 80 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":76,"t73":79,"difference":-3},"brilliance":{"value":72,"t73":94,"difference":-22},"fire":{"value":59,"t73":37,"difference":22},"scintillation":{"value":80,"t73":80,"difference":0},"spread":{"value":107,"t73":100,"difference":7},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":83,"t73":102,"difference":-19},"tilt":{"value":87,"t73":75,"difference":12}},"pros":[],"cons":[{"point":"Much less fire than in diamond","figures":"59 vs 87"},{"point":"Less light than the T73","figures":"72 vs 94"},{"point":"Heavier than diamond, even when shallow","figures":"0.91 vs 0.80 ct"},{"point":"Over three times the T73's leakage","figures":"17 vs 5"}]},{"cut":"cushion","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/cushion","headline":"Cushion Cut Sapphire: more light than the same cushion in diamond","summary":"Our modern cushion returns more light in sapphire than it does in diamond, and more than any other fancy shape we measure in sapphire.","scores_line":"Brilliance 88 · Fire 36 · Scintillation 85 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":76,"t73":79,"difference":-3},"brilliance":{"value":88,"t73":94,"difference":-6},"fire":{"value":36,"t73":37,"difference":-1},"scintillation":{"value":85,"t73":80,"difference":5},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":97,"t73":100,"difference":-3},"shape_norm":{"value":103,"t73":102,"difference":1},"tilt":{"value":72,"t73":75,"difference":-3}},"pros":[{"point":"More light than the diamond cushion","figures":"88 vs 80"},{"point":"A little more sparkle than the T73","figures":"85 vs 80"}],"cons":[{"point":"Half the diamond cushion's fire","figures":"36 vs 73"},{"point":"Loses light faster than in diamond when tipped","figures":"72 vs 92"},{"point":"Heavier than diamond for its size","figures":"1.44 vs 1.27 ct"},{"point":"Twice the T73's leakage","figures":"11 vs 5"}]},{"cut":"teardrop","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/teardrop","headline":"Teardrop Cut Sapphire: far more fire than a round, and more face for its weight","summary":"A drop outline 1.445 times as long as it is wide: in sapphire it has far more fire than the round and more face for its weight, but gives back less light, and keeps only 52 of it when tipped.","scores_line":"Brilliance 59 · Fire 64 · Scintillation 81 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":67,"t73":79,"difference":-12},"brilliance":{"value":59,"t73":94,"difference":-35},"fire":{"value":64,"t73":37,"difference":27},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":98,"t73":100,"difference":-2},"shape_norm":{"value":69,"t73":102,"difference":-33},"tilt":{"value":52,"t73":75,"difference":-23}},"pros":[{"point":"Much more fire than the T73","figures":"64 vs 37"},{"point":"More face for its weight than the T73","figures":"116 vs 100"}],"cons":[{"point":"Far less light than the T73","figures":"59 vs 94"},{"point":"Holds its light poorly when tipped","figures":"52 vs 80"},{"point":"Nearly a quarter of the light leaks","figures":"23 vs 5"},{"point":"Heavier than diamond","figures":"1.46 vs 1.28 ct"}]},{"cut":"square","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/square","headline":"Square Cut Sapphire: the square brilliant, short of the round on light and of diamond on fire","summary":"The square counterpart of the round brilliant: in sapphire it loses about a sixth of the round's light and holds steady when tipped.","scores_line":"Brilliance 78 · Fire 45 · Scintillation 78 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":75,"t73":79,"difference":-4},"brilliance":{"value":78,"t73":94,"difference":-16},"fire":{"value":45,"t73":37,"difference":8},"scintillation":{"value":78,"t73":80,"difference":-2},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":102,"t73":102,"difference":0},"tilt":{"value":84,"t73":75,"difference":9}},"pros":[],"cons":[{"point":"Much less fire than in diamond","figures":"45 vs 72"},{"point":"About a sixth less light than the T73","figures":"78 vs 94"},{"point":"Heavier than diamond","figures":"1.30 vs 1.14 ct"},{"point":"Three times the T73's leakage","figures":"16 vs 5"}]},{"cut":"princess","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/princess","headline":"Princess Cut Sapphire: a square brilliant that leaks over a quarter of its light","summary":"A square brilliant on a 41.94° pavilion: in sapphire it lets 27% of its light out of the back, against 5% for the T73.","scores_line":"Brilliance 68 · Fire 52 · Scintillation 78 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":71,"t73":79,"difference":-8},"brilliance":{"value":68,"t73":94,"difference":-26},"fire":{"value":52,"t73":37,"difference":15},"scintillation":{"value":78,"t73":80,"difference":-2},"spread":{"value":95,"t73":100,"difference":-5},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":106,"t73":102,"difference":4},"tilt":{"value":76,"t73":75,"difference":1}},"pros":[],"cons":[{"point":"Well short of the diamond princess on fire","figures":"52 vs 83"},{"point":"Over a quarter less light than the T73","figures":"68 vs 94"},{"point":"Over a quarter of the light leaks","figures":"27 vs 5"},{"point":"Heavier than diamond, and deep","figures":"1.68 vs 1.48 ct"}]},{"cut":"emerald-square","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/emerald-square","headline":"Emerald Square Cut Sapphire: a step-cut square that holds its light at a tilt better than in diamond","summary":"Concentric steps on a square: in sapphire it holds its light at a tilt better than the diamond version does, and returns far less of it than a round.","scores_line":"Brilliance 71 · Fire 53 · Scintillation 72 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":73,"t73":79,"difference":-6},"brilliance":{"value":71,"t73":94,"difference":-23},"fire":{"value":53,"t73":37,"difference":16},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":108,"t73":100,"difference":8},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":94,"t73":102,"difference":-8},"tilt":{"value":86,"t73":75,"difference":11}},"pros":[{"point":"Holds its light better than the diamond version when tipped","figures":"86 vs 79"}],"cons":[{"point":"Much less fire than in diamond","figures":"53 vs 84"},{"point":"Far less light than a round","figures":"71 vs 94"},{"point":"Over a fifth of the light leaks","figures":"22 vs 5"},{"point":"Heavier than diamond","figures":"1.66 vs 1.46 ct"}]},{"cut":"marquise","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/marquise","headline":"Marquise Cut Sapphire: the most face per carat we measure, level with the rectangle","summary":"A long, pointed outline with as much face per carat as any cut we measure and more sparkle than the round, while nearly two-fifths of its light leaves through the back.","scores_line":"Brilliance 55 · Fire 54 · Scintillation 86 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":63,"t73":79,"difference":-16},"brilliance":{"value":55,"t73":94,"difference":-39},"fire":{"value":54,"t73":37,"difference":17},"scintillation":{"value":86,"t73":80,"difference":6},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":94,"t73":100,"difference":-6},"shape_norm":{"value":64,"t73":102,"difference":-38},"tilt":{"value":56,"t73":75,"difference":-19}},"pros":[{"point":"The largest face for its weight, shared with the rectangle","figures":"121 vs 100"},{"point":"More sparkle than the T73","figures":"86 vs 80"}],"cons":[{"point":"Little more than half the T73's light","figures":"55 vs 94"},{"point":"Much less fire than the diamond marquise","figures":"54 vs 89"},{"point":"Nearly two-fifths of the light leaks","figures":"39 vs 5"},{"point":"Darkens quickly at an angle","figures":"56 vs 87"}]},{"cut":"pear","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/pear","headline":"Pear Cut Sapphire: a drop that faces up larger than a round of its weight","summary":"In sapphire the pear sits between the oval and the marquise: more light than the marquise, less than the oval, and a face per carat between theirs, well above a round's.","scores_line":"Brilliance 62 · Fire 56 · Scintillation 76 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":65,"t73":79,"difference":-14},"brilliance":{"value":62,"t73":94,"difference":-32},"fire":{"value":56,"t73":37,"difference":19},"scintillation":{"value":76,"t73":80,"difference":-4},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":85,"t73":100,"difference":-15},"shape_norm":{"value":72,"t73":102,"difference":-30},"tilt":{"value":55,"t73":75,"difference":-20}},"pros":[{"point":"More face for its weight than the T73","figures":"115 vs 100"}],"cons":[{"point":"A third less light than the T73","figures":"62 vs 94"},{"point":"Far less fire than in diamond","figures":"56 vs 84"},{"point":"Darkens at an angle","figures":"55 vs 80"},{"point":"A quarter of the light leaks","figures":"26 vs 5"}]},{"cut":"dg-m5","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/dg-m5","headline":"DG-M5 Emerald: the most light of any cut we measure in this stone","summary":"Twelve-fold, one pavilion angle, and the most light we measure in emerald: Brilliance 90, with only 10% leaking out of the back.","scores_line":"Brilliance 90 · Fire 46 · Scintillation 85 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":78,"t73":73,"difference":5},"brilliance":{"value":90,"t73":78,"difference":12},"fire":{"value":46,"t73":39,"difference":7},"scintillation":{"value":85,"t73":80,"difference":5},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":97,"t73":84,"difference":13},"tilt":{"value":64,"t73":77,"difference":-13}},"pros":[{"point":"Lighter than a diamond of the same size","figures":"0.76 vs 0.98 ct"},{"point":"The most light we measure in emerald","figures":"90 vs 78"},{"point":"Under half the T73's leakage","figures":"10 vs 22"},{"point":"A little more sparkle than the T73","figures":"85 vs 80"}],"cons":[{"point":"Far less fire than the diamond version","figures":"46 vs 67"},{"point":"Gives up more light as it tips","figures":"64 vs 83"}]},{"cut":"dg-anteros","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/dg-anteros","headline":"DG-Anteros Emerald: lighter in weight than diamond, and second only to DG-M5 for light in this stone","summary":"DG-Anteros, the T73's plan with new angles, returns more light in emerald than the T73 does. Its listed cons are measured against the same cut in diamond, which does better still.","scores_line":"Brilliance 86 · Fire 52 · Scintillation 80 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":77,"t73":73,"difference":4},"brilliance":{"value":86,"t73":78,"difference":8},"fire":{"value":52,"t73":39,"difference":13},"scintillation":{"value":80,"t73":80,"difference":0},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":92,"t73":84,"difference":8},"tilt":{"value":69,"t73":77,"difference":-8}},"pros":[{"point":"Lighter than the same cut in diamond","figures":"0.75 vs 0.97 ct"}],"cons":[{"point":"Much less fire than in diamond","figures":"52 vs 74"},{"point":"Holds less light when tilted than in diamond","figures":"69 vs 85"},{"point":"More leakage than in diamond","figures":"14 vs 2"},{"point":"A little less light than the diamond version","figures":"86 vs 95"}]},{"cut":"dg-vitruvio","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/dg-vitruvio","headline":"DG-Vitruvio Emerald: the T73's light, with sparkle level with the highest we measure in this stone","summary":"The T73's crown and pavilion with a 96-facet girdle: in emerald it matches the T73 on Brilliance (78) and leakage (22%), and scores 98 for Scintillation to the T73's 80.","scores_line":"Brilliance 78 · Fire 40 · Scintillation 98 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":74,"t73":73,"difference":1},"brilliance":{"value":78,"t73":78,"difference":0},"fire":{"value":40,"t73":39,"difference":1},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":84,"t73":84,"difference":0},"tilt":{"value":78,"t73":77,"difference":1}},"pros":[{"point":"Lighter in the hand than diamond","figures":"0.79 vs 1.02 ct"},{"point":"Much finer sparkle than the T73","figures":"98 vs 80"}],"cons":[{"point":"Fire falls by half against diamond","figures":"40 vs 79"},{"point":"Over a fifth of the light leaks","figures":"22 vs 2"},{"point":"Less light than in diamond","figures":"78 vs 93"},{"point":"Keeps less light when tipped than in diamond","figures":"78 vs 93"}]},{"cut":"dg-miliano","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/dg-miliano","headline":"DG-Miliano Emerald: sparkle level with the highest we measure here, and lighter in weight than diamond","summary":"Three tiers of pavilion facets and a 96-facet girdle: in emerald DG-Miliano scores 98 for Scintillation, level with DG-Vitruvio and the Portuguese Bird's Nest for the highest we measure, and 67 for Brilliance against the T73's 78.","scores_line":"Brilliance 67 · Fire 34 · Scintillation 98 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":71,"t73":73,"difference":-2},"brilliance":{"value":67,"t73":78,"difference":-11},"fire":{"value":34,"t73":39,"difference":-5},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":72,"t73":84,"difference":-12},"tilt":{"value":92,"t73":77,"difference":15}},"pros":[{"point":"Lighter for its width than diamond","figures":"0.80 vs 1.03 ct"},{"point":"Sparkle level with the highest we measure","figures":"98 vs 80"}],"cons":[{"point":"Well under half the diamond version's fire","figures":"34 vs 82"},{"point":"A third of the light leaks","figures":"33 vs 3"},{"point":"Much less light than in diamond","figures":"67 vs 95"}]},{"cut":"t73-round-brilliant","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/t73-round-brilliant","headline":"T73 Round Brilliant Emerald: more sparkle than the T57, on the same proportions","summary":"Our benchmark round, set against the T57, the same plan without the sixteen girdle facets: in emerald it scores 80 for Scintillation to the T57's 72, with the same Brilliance, 78.","scores_line":"Brilliance 78 · Fire 39 · Scintillation 80 · in our census, where the T57 scores 78 · 40 · 72 in emerald","scores":{"global":{"value":73,"t73":72,"difference":1},"brilliance":{"value":78,"t73":78,"difference":0},"fire":{"value":39,"t73":40,"difference":-1},"scintillation":{"value":80,"t73":72,"difference":8},"spread":{"value":100,"t73":101,"difference":-1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":84,"t73":84,"difference":0},"tilt":{"value":77,"t73":76,"difference":1}},"pros":[{"point":"Lighter than a diamond T73","figures":"0.78 vs 1.01 ct"},{"point":"More sparkle than the T57","figures":"80 vs 72"}],"cons":[{"point":"Half the fire of a diamond T73","figures":"39 vs 78"},{"point":"Over a fifth of the light leaks","figures":"22 vs 2"},{"point":"Less light than the diamond version","figures":"78 vs 93"},{"point":"Keeps less light when tilted","figures":"77 vs 92"}]},{"cut":"t105-round-brilliant","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/t105-round-brilliant","headline":"T105 Round Brilliant Emerald: more sparkle than the T73, and more face for its weight","summary":"Forty-eight more facets than the T57 and no girdle band: more sparkle in emerald, and less light than the T73 gives.","scores_line":"Brilliance 71 · Fire 34 · Scintillation 90 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":70,"t73":73,"difference":-3},"brilliance":{"value":71,"t73":78,"difference":-7},"fire":{"value":34,"t73":39,"difference":-5},"scintillation":{"value":90,"t73":80,"difference":10},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":77,"t73":84,"difference":-7},"tilt":{"value":83,"t73":77,"difference":6}},"pros":[{"point":"Lighter than a diamond of the same width","figures":"0.71 vs 0.92 ct"},{"point":"More sparkle than the T73","figures":"90 vs 80"},{"point":"A little more face per carat than the T73","figures":"106 vs 100"}],"cons":[{"point":"Much less fire than in diamond","figures":"34 vs 77"},{"point":"Nearly three in ten rays leak","figures":"29 vs 1"},{"point":"Much less light than in diamond","figures":"71 vs 95"},{"point":"Slightly less steady when tilted than in diamond","figures":"83 vs 87"}]},{"cut":"t57-round-brilliant","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/t57-round-brilliant","headline":"T57 Round Brilliant Emerald: the T73's light in this stone, and more face for its weight","summary":"The knife-edge round with 57 facets and no girdle band: in emerald it returns exactly the T73's light, Brilliance 78, and faces up larger for its weight, 107 against 100.","scores_line":"Brilliance 78 · Fire 40 · Scintillation 72 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":72,"t73":73,"difference":-1},"brilliance":{"value":78,"t73":78,"difference":0},"fire":{"value":40,"t73":39,"difference":1},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":84,"t73":84,"difference":0},"tilt":{"value":76,"t73":77,"difference":-1}},"pros":[{"point":"Lighter than a diamond T57","figures":"0.71 vs 0.92 ct"},{"point":"The most face per carat of our emerald rounds","figures":"107 vs 100"}],"cons":[{"point":"About half the diamond version's fire","figures":"40 vs 79"},{"point":"A fifth of the light leaks","figures":"22 vs 2"},{"point":"Less light than in diamond","figures":"78 vs 92"},{"point":"Holds less light tilted than in diamond","figures":"76 vs 90"}]},{"cut":"old-european","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/old-european","headline":"Old European Cut Emerald: a small-table round, lighter in the hand than diamond","summary":"A round with a small 45.0% table. In diamond it returns 90 for light; in emerald, 64 to the T73's 78.","scores_line":"Brilliance 64 · Fire 42 · Scintillation 81 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":70,"t73":73,"difference":-3},"brilliance":{"value":64,"t73":78,"difference":-14},"fire":{"value":42,"t73":39,"difference":3},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":100,"t73":84,"difference":16},"tilt":{"value":96,"t73":77,"difference":19}},"pros":[{"point":"Lighter than a diamond Old European","figures":"0.84 vs 1.09 ct"}],"cons":[{"point":"Far less fire than in diamond","figures":"42 vs 74"},{"point":"Over a third of the light leaks","figures":"36 vs 5"},{"point":"Under three-quarters of the diamond version's light","figures":"64 vs 90"},{"point":"A smaller face than the T73 for its weight","figures":"95 vs 100"}]},{"cut":"dg-rafaello","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/dg-rafaello","headline":"DG-Rafaello Emerald: sparkle near the top of what we measure in this stone, and more face for its weight than the T73","summary":"In diamond DG-Rafaello returns 94 for Brilliance. In emerald it returns 54, and 46% of its light leaves through the pavilion.","scores_line":"Brilliance 54 · Fire 28 · Scintillation 96 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":65,"t73":73,"difference":-8},"brilliance":{"value":54,"t73":78,"difference":-24},"fire":{"value":28,"t73":39,"difference":-11},"scintillation":{"value":96,"t73":80,"difference":16},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":58,"t73":84,"difference":-26},"tilt":{"value":100,"t73":77,"difference":23}},"pros":[{"point":"Lighter than the same cut in diamond","figures":"0.73 vs 0.94 ct"},{"point":"Much more sparkle than the T73","figures":"96 vs 80"},{"point":"A wider stone than the T73 for each carat","figures":"106 vs 100"}],"cons":[{"point":"Very little fire against the diamond version","figures":"28 vs 80"},{"point":"Nearly half the light leaks","figures":"46 vs 5"},{"point":"Little more than half the diamond version's light","figures":"54 vs 94"}]},{"cut":"old-single","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/old-single","headline":"Old Single Cut Emerald: lighter in weight than diamond, but second-lowest for light in this stone","summary":"An Old Single in emerald loses three-quarters of its light through the pavilion; the same cut in diamond loses 19%. Brilliance is 17 against the T73's 78.","scores_line":"Brilliance 17 · Fire 32 · Scintillation 44 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":45,"t73":73,"difference":-28},"brilliance":{"value":17,"t73":78,"difference":-61},"fire":{"value":32,"t73":39,"difference":-7},"scintillation":{"value":44,"t73":80,"difference":-36},"spread":{"value":97,"t73":100,"difference":-3},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":18,"t73":84,"difference":-66},"tilt":{"value":100,"t73":77,"difference":23}},"pros":[{"point":"Lighter than an eight-cut diamond","figures":"0.81 vs 1.05 ct"}],"cons":[{"point":"A small fraction of the T73's light","figures":"17 vs 78"},{"point":"Three-quarters of the light leaks","figures":"75 vs 19"},{"point":"Little fire, below even the T73 in emerald","figures":"32 vs 84"},{"point":"Few, large flashes","figures":"44 vs 80"}]},{"cut":"oval","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/oval","headline":"Oval Cut Emerald: the most fire we measure in this stone","summary":"Of every cut we measure in emerald, the oval scores highest for fire. It returns less light than the T73: Brilliance 55 against 78.","scores_line":"Brilliance 55 · Fire 71 · Scintillation 87 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":69,"t73":73,"difference":-4},"brilliance":{"value":55,"t73":78,"difference":-23},"fire":{"value":71,"t73":39,"difference":32},"scintillation":{"value":87,"t73":80,"difference":7},"spread":{"value":99,"t73":100,"difference":-1},"symmetry":{"value":98,"t73":100,"difference":-2},"shape_norm":{"value":64,"t73":84,"difference":-20},"tilt":{"value":71,"t73":77,"difference":-6}},"pros":[{"point":"Far more fire than a round emerald","figures":"71 vs 39"},{"point":"Lighter than an oval diamond","figures":"1.10 vs 1.42 ct"},{"point":"More face for its weight than a round","figures":"108 vs 100"},{"point":"Slightly more sparkle than the T73","figures":"87 vs 80"}],"cons":[{"point":"Much less light than the T73","figures":"55 vs 78"},{"point":"Loses more light when tipped than in diamond","figures":"71 vs 92"},{"point":"Two-fifths of the light leaks","figures":"41 vs 22"}]},{"cut":"teardrop","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/teardrop","headline":"Teardrop Cut Emerald: a drop shape with far more face per carat than a round","summary":"In emerald the teardrop faces up far larger than a round of the same weight and outscores it on fire, but gives up light, and more of it again as it tips.","scores_line":"Brilliance 54 · Fire 63 · Scintillation 81 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":64,"t73":73,"difference":-9},"brilliance":{"value":54,"t73":78,"difference":-24},"fire":{"value":63,"t73":39,"difference":24},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":98,"t73":100,"difference":-2},"shape_norm":{"value":62,"t73":84,"difference":-22},"tilt":{"value":53,"t73":77,"difference":-24}},"pros":[{"point":"Lighter than a diamond teardrop","figures":"0.99 vs 1.28 ct"},{"point":"Far more face per carat than a round","figures":"116 vs 100"}],"cons":[{"point":"Loses a large share of its light as it tips","figures":"53 vs 80"},{"point":"Less fire than the diamond teardrop","figures":"63 vs 89"},{"point":"Less light than a round emerald","figures":"54 vs 78"},{"point":"More leakage than the T73","figures":"36 vs 22"}]},{"cut":"trillion","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/trillion","headline":"Trillion Cut Emerald: a shallow triangle, lighter than diamond at the same width","summary":"A shallow three-sided brilliant: lighter than a diamond of its width, level with a round for face per carat, and dimmer than the T73.","scores_line":"Brilliance 63 · Fire 48 · Scintillation 80 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":70,"t73":73,"difference":-3},"brilliance":{"value":63,"t73":78,"difference":-15},"fire":{"value":48,"t73":39,"difference":9},"scintillation":{"value":80,"t73":80,"difference":0},"spread":{"value":107,"t73":100,"difference":7},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":74,"t73":84,"difference":-10},"tilt":{"value":86,"t73":77,"difference":9}},"pros":[{"point":"Lighter than a diamond trillion","figures":"0.62 vs 0.80 ct"}],"cons":[{"point":"Much less fire than in diamond","figures":"48 vs 87"},{"point":"Less light than a round emerald","figures":"63 vs 78"},{"point":"Twice the diamond trillion's leakage","figures":"27 vs 13"}]},{"cut":"pear","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/pear","headline":"Pear Cut Emerald: a drop shape that faces up far larger than a round of its weight","summary":"A drop with a single point: in emerald the pear out-fires a round and keeps less light, and less again once it tips.","scores_line":"Brilliance 56 · Fire 59 · Scintillation 76 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":63,"t73":73,"difference":-10},"brilliance":{"value":56,"t73":78,"difference":-22},"fire":{"value":59,"t73":39,"difference":20},"scintillation":{"value":76,"t73":80,"difference":-4},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":85,"t73":100,"difference":-15},"shape_norm":{"value":66,"t73":84,"difference":-18},"tilt":{"value":57,"t73":77,"difference":-20}},"pros":[{"point":"Lighter than a pear diamond","figures":"1.06 vs 1.37 ct"},{"point":"A larger face for its weight than a round","figures":"115 vs 100"}],"cons":[{"point":"Less fire than the diamond pear","figures":"59 vs 84"},{"point":"Gives up light as it tips","figures":"57 vs 80"},{"point":"Less light than the T73 in emerald","figures":"56 vs 78"},{"point":"A less regular pavilion","figures":"85 vs 100"}]},{"cut":"asscher","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/asscher","headline":"Asscher Cut Emerald: a square step cut, lighter in weight than the same cut in diamond","summary":"A square step cut with deeply cropped corners: in emerald it shows more fire than a round, and over a third of the light goes through it.","scores_line":"Brilliance 62 · Fire 55 · Scintillation 72 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":69,"t73":73,"difference":-4},"brilliance":{"value":62,"t73":78,"difference":-16},"fire":{"value":55,"t73":39,"difference":16},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":107,"t73":100,"difference":7},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":82,"t73":84,"difference":-2},"tilt":{"value":84,"t73":77,"difference":7}},"pros":[{"point":"Lighter than a diamond Asscher","figures":"1.04 vs 1.34 ct"}],"cons":[{"point":"Over a third of the light leaks","figures":"37 vs 11"},{"point":"Less fire than the diamond Asscher","figures":"55 vs 80"},{"point":"Less light than the T73","figures":"62 vs 78"},{"point":"Fewer flashes than a round","figures":"72 vs 80"}]},{"cut":"trilliant","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/trilliant","headline":"Trilliant Cut Emerald: a straight-sided triangle, lighter in weight than diamond for its size","summary":"Straight sides and sharp corners: of the triangles we measure in emerald, the trilliant returns the most light and has the least regular pavilion.","scores_line":"Brilliance 68 · Fire 41 · Scintillation 79 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":64,"t73":73,"difference":-9},"brilliance":{"value":68,"t73":78,"difference":-10},"fire":{"value":41,"t73":39,"difference":2},"scintillation":{"value":79,"t73":80,"difference":-1},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":62,"t73":100,"difference":-38},"shape_norm":{"value":79,"t73":84,"difference":-5},"tilt":{"value":72,"t73":77,"difference":-5}},"pros":[{"point":"Lighter than a diamond trilliant","figures":"0.74 vs 0.96 ct"}],"cons":[{"point":"Half the fire of the diamond version","figures":"41 vs 83"},{"point":"An irregular pavilion","figures":"62 vs 100"},{"point":"Nearly three times the diamond version's leakage","figures":"31 vs 11"},{"point":"Holds less light when tipped than in diamond","figures":"72 vs 89"}]},{"cut":"cushion","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/cushion","headline":"Cushion Cut Emerald: more sparkle than the T73, and the most light of the fancy shapes we measure in this stone","summary":"Rounded corners and a brilliant facet plan: of the fancy shapes we measure in emerald, the cushion returns the most light, 74, and it shows less fire than any other cut in emerald's two top-ten lists.","scores_line":"Brilliance 74 · Fire 27 · Scintillation 85 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":67,"t73":73,"difference":-6},"brilliance":{"value":74,"t73":78,"difference":-4},"fire":{"value":27,"t73":39,"difference":-12},"scintillation":{"value":85,"t73":80,"difference":5},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":97,"t73":100,"difference":-3},"shape_norm":{"value":86,"t73":84,"difference":2},"tilt":{"value":68,"t73":77,"difference":-9}},"pros":[{"point":"Lighter than a diamond cushion","figures":"0.98 vs 1.27 ct"},{"point":"A little more sparkle than the T73","figures":"85 vs 80"}],"cons":[{"point":"The least fire of emerald's top-ten cuts","figures":"27 vs 73"},{"point":"Loses more light tilted than in diamond","figures":"68 vs 92"},{"point":"A quarter of the light leaks","figures":"25 vs 9"},{"point":"A little less light than the diamond cushion","figures":"74 vs 80"}]},{"cut":"square","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/square","headline":"Square Cut Emerald: the square brilliant, lighter in weight than the same cut in diamond","summary":"The square counterpart of the round brilliant: in emerald it returns 68 for Brilliance against 85 for the diamond version, and lets 26% of its light through the pavilion.","scores_line":"Brilliance 68 · Fire 38 · Scintillation 78 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":70,"t73":73,"difference":-3},"brilliance":{"value":68,"t73":78,"difference":-10},"fire":{"value":38,"t73":39,"difference":-1},"scintillation":{"value":78,"t73":80,"difference":-2},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":90,"t73":84,"difference":6},"tilt":{"value":85,"t73":77,"difference":8}},"pros":[{"point":"Lighter than a square diamond","figures":"0.88 vs 1.14 ct"}],"cons":[{"point":"Half the diamond version's fire","figures":"38 vs 72"},{"point":"Less light than the diamond square","figures":"68 vs 85"},{"point":"About a quarter of the light leaks","figures":"26 vs 10"}]},{"cut":"emerald-square","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/emerald-square","headline":"Emerald Square Cut Emerald: a square step cut that shares the stone's name, lighter in weight than in diamond","summary":"A square step cut with cropped corners: in emerald it returns a little more light than in diamond, and faces up level with a round of the same weight.","scores_line":"Brilliance 66 · Fire 46 · Scintillation 72 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":68,"t73":73,"difference":-5},"brilliance":{"value":66,"t73":78,"difference":-12},"fire":{"value":46,"t73":39,"difference":7},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":108,"t73":100,"difference":8},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":87,"t73":84,"difference":3},"tilt":{"value":77,"t73":77,"difference":0}},"pros":[{"point":"Lighter than the diamond version","figures":"1.13 vs 1.46 ct"}],"cons":[{"point":"Much less fire than in diamond","figures":"46 vs 84"},{"point":"A third of the light leaks","figures":"32 vs 17"},{"point":"Less light than a round","figures":"66 vs 78"},{"point":"Fewer, broader flashes than a round","figures":"72 vs 80"}]},{"cut":"marquise","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/marquise","headline":"Marquise Cut Emerald: far more face per carat than a round, on a long, pointed outline","summary":"Pointed at both ends and twice as long as wide: in emerald the marquise faces up far larger than a round of its weight, scores 86 for Scintillation to the T73's 80, and lets more than half its light through the pavilion.","scores_line":"Brilliance 43 · Fire 51 · Scintillation 86 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":57,"t73":73,"difference":-16},"brilliance":{"value":43,"t73":78,"difference":-35},"fire":{"value":51,"t73":39,"difference":12},"scintillation":{"value":86,"t73":80,"difference":6},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":94,"t73":100,"difference":-6},"shape_norm":{"value":50,"t73":84,"difference":-34},"tilt":{"value":61,"t73":77,"difference":-16}},"pros":[{"point":"Lighter than a diamond marquise","figures":"1.62 vs 2.09 ct"},{"point":"The most face per carat we measure, level with the rectangle","figures":"121 vs 100"},{"point":"Slightly more sparkle than a round","figures":"86 vs 80"}],"cons":[{"point":"Much less fire than the diamond marquise","figures":"51 vs 89"},{"point":"Over half the light leaks","figures":"54 vs 17"},{"point":"A little over half the T73's light","figures":"43 vs 78"},{"point":"Loses more light as it tips than in diamond","figures":"61 vs 87"}]},{"cut":"dg-m5","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/dg-m5","headline":"DG-M5 Amethyst: more light back than any other cut we measure in quartz","summary":"Light inside amethyst must meet a facet beyond 40.4° to stay in. DG-M5 returns more of it than any other cut we measure in amethyst: Brilliance 85 against 72 for the T73.","scores_line":"Brilliance 85 · Fire 50 · Scintillation 85 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":76,"t73":70,"difference":6},"brilliance":{"value":85,"t73":72,"difference":13},"fire":{"value":50,"t73":36,"difference":14},"scintillation":{"value":85,"t73":80,"difference":5},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":91,"t73":77,"difference":14},"tilt":{"value":63,"t73":80,"difference":-17}},"pros":[{"point":"A quarter lighter than diamond","figures":"0.74 vs 0.98 ct"},{"point":"The most light of any cut we measure in amethyst","figures":"85 vs 72"},{"point":"Less light out of the back","figures":"15 vs 28"},{"point":"A little more sparkle than the T73","figures":"85 vs 80"}],"cons":[{"point":"Holds less light when tipped","figures":"63 vs 83"},{"point":"Less fire than the diamond version","figures":"50 vs 67"}]},{"cut":"dg-anteros","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/dg-anteros","headline":"DG-Anteros Amethyst: lighter in weight than diamond, and second only to DG-M5 for light here","summary":"In amethyst, DG-Anteros beats the T73 for light and fire, and still lists four cons, because the diamond version sets the bar.","scores_line":"Brilliance 82 · Fire 54 · Scintillation 80 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":76,"t73":70,"difference":6},"brilliance":{"value":82,"t73":72,"difference":10},"fire":{"value":54,"t73":36,"difference":18},"scintillation":{"value":80,"t73":80,"difference":0},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":88,"t73":77,"difference":11},"tilt":{"value":69,"t73":80,"difference":-11}},"pros":[{"point":"Lighter than the diamond version","figures":"0.73 vs 0.97 ct"}],"cons":[{"point":"Less fire than in diamond","figures":"54 vs 74"},{"point":"Keeps less light when tipped","figures":"69 vs 85"},{"point":"More light out of the back than in diamond","figures":"18 vs 2"},{"point":"Less light than the diamond version","figures":"82 vs 95"}]},{"cut":"dg-vitruvio","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/dg-vitruvio","headline":"DG-Vitruvio Amethyst: sparkle level with the highest we measure, with light close to the T73's","summary":"A round with its girdle cut into 96 facets. In amethyst it sparkles far more than the T73 and otherwise behaves almost exactly like it.","scores_line":"Brilliance 71 · Fire 36 · Scintillation 98 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":71,"t73":70,"difference":1},"brilliance":{"value":71,"t73":72,"difference":-1},"fire":{"value":36,"t73":36,"difference":0},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":76,"t73":77,"difference":-1},"tilt":{"value":81,"t73":80,"difference":1}},"pros":[{"point":"Lighter than diamond at the same size","figures":"0.77 vs 1.02 ct"},{"point":"Much more sparkle than the T73","figures":"98 vs 80"}],"cons":[{"point":"Far less fire than the diamond version","figures":"36 vs 79"},{"point":"Much more leakage than in diamond","figures":"29 vs 2"},{"point":"Less light than in diamond","figures":"71 vs 93"},{"point":"Holds less light when tipped than in diamond","figures":"81 vs 93"}]},{"cut":"t73-round-brilliant","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/t73-round-brilliant","headline":"T73 Round Brilliant Amethyst: more sparkle than the T57, with light and fire within a point of it","summary":"Our benchmark round, measured in quartz: sixteen girdle facets more than the T57 and Scintillation 80 against its 72, while Brilliance falls to 72 from 93 in diamond.","scores_line":"Brilliance 72 · Fire 36 · Scintillation 80 · in our census, where the T57 scores 71 · 37 · 72 in amethyst","scores":{"global":{"value":70,"t73":69,"difference":1},"brilliance":{"value":72,"t73":71,"difference":1},"fire":{"value":36,"t73":37,"difference":-1},"scintillation":{"value":80,"t73":72,"difference":8},"spread":{"value":100,"t73":101,"difference":-1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":77,"t73":77,"difference":0},"tilt":{"value":80,"t73":79,"difference":1}},"pros":[{"point":"A quarter lighter than diamond","figures":"0.76 vs 1.01 ct"},{"point":"More sparkle than the T57","figures":"80 vs 72"}],"cons":[{"point":"Less than half the diamond's fire","figures":"36 vs 78"},{"point":"Far more leakage than in diamond","figures":"28 vs 2"},{"point":"Less light than in diamond","figures":"72 vs 93"},{"point":"Keeps less light when tipped","figures":"80 vs 92"}]},{"cut":"t105-round-brilliant","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/t105-round-brilliant","headline":"T105 Round Brilliant Amethyst: more sparkle than the T73, at a cost in light","summary":"Forty-eight more facets than the T57. In amethyst the T105 sparkles more than that round, 90 against 72, and returns less light, 65 against 71.","scores_line":"Brilliance 65 · Fire 31 · Scintillation 90 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":68,"t73":70,"difference":-2},"brilliance":{"value":65,"t73":72,"difference":-7},"fire":{"value":31,"t73":36,"difference":-5},"scintillation":{"value":90,"t73":80,"difference":10},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":70,"t73":77,"difference":-7},"tilt":{"value":87,"t73":80,"difference":7}},"pros":[{"point":"Lighter than diamond","figures":"0.69 vs 0.92 ct"},{"point":"More sparkle than the T73","figures":"90 vs 80"},{"point":"More face per carat than the T73","figures":"106 vs 100"}],"cons":[{"point":"Much less fire than in diamond","figures":"31 vs 77"},{"point":"A third of the light leaks","figures":"35 vs 1"},{"point":"Far less light than in diamond","figures":"65 vs 95"}]},{"cut":"dg-miliano","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/dg-miliano","headline":"DG-Miliano Amethyst: sparkle level with the highest we measure","summary":"A round with a three-tier pavilion and a facet plan that shares our highest sparkle score. In quartz much of its light leaks.","scores_line":"Brilliance 60 · Fire 28 · Scintillation 98 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":68,"t73":70,"difference":-2},"brilliance":{"value":60,"t73":72,"difference":-12},"fire":{"value":28,"t73":36,"difference":-8},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":65,"t73":77,"difference":-12},"tilt":{"value":97,"t73":80,"difference":17}},"pros":[{"point":"Lighter than diamond","figures":"0.78 vs 1.03 ct"},{"point":"Sparkle level with the highest we measure","figures":"98 vs 80"}],"cons":[{"point":"A third of the diamond version's fire","figures":"28 vs 82"},{"point":"Two-fifths of the light leaks","figures":"40 vs 3"},{"point":"Much less light than in diamond","figures":"60 vs 95"}]},{"cut":"t57-round-brilliant","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/t57-round-brilliant","headline":"T57 Round Brilliant Amethyst: more face for its weight than any other round we measure","summary":"The 57-facet round comes within a point of the T73 for light in amethyst, and shows more face for its weight, 107 against 100. Quartz takes the fire.","scores_line":"Brilliance 71 · Fire 37 · Scintillation 72 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":69,"t73":70,"difference":-1},"brilliance":{"value":71,"t73":72,"difference":-1},"fire":{"value":37,"t73":36,"difference":1},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":77,"t73":77,"difference":0},"tilt":{"value":79,"t73":80,"difference":-1}},"pros":[{"point":"Lighter than diamond","figures":"0.69 vs 0.92 ct"},{"point":"The most face per carat of any round here","figures":"107 vs 100"}],"cons":[{"point":"Less than half the diamond's fire","figures":"37 vs 79"},{"point":"Over a quarter of the light leaks","figures":"29 vs 2"},{"point":"Less light than the diamond version","figures":"71 vs 92"},{"point":"Keeps less light when tipped","figures":"79 vs 90"}]},{"cut":"old-european","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/old-european","headline":"Old European Cut Amethyst: a quarter lighter in weight than diamond at the same size","summary":"In diamond this historic round comes close to the T73; in quartz it falls well behind, and 41% of its light leaks.","scores_line":"Brilliance 59 · Fire 37 · Scintillation 81 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":67,"t73":70,"difference":-3},"brilliance":{"value":59,"t73":72,"difference":-13},"fire":{"value":37,"t73":36,"difference":1},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":92,"t73":77,"difference":15},"tilt":{"value":100,"t73":80,"difference":20}},"pros":[{"point":"Lighter than the diamond version","figures":"0.82 vs 1.09 ct"}],"cons":[{"point":"Half the fire of the diamond version","figures":"37 vs 74"},{"point":"Two-fifths of the light leaks","figures":"41 vs 5"},{"point":"Far less light than the diamond version","figures":"59 vs 90"},{"point":"A little less face for its weight","figures":"95 vs 100"}]},{"cut":"dg-rafaello","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/dg-rafaello","headline":"DG-Rafaello Amethyst: much more sparkle than the T73, and a little more face per carat","summary":"A twelve-fold round with a five-tier pavilion: in quartz more than half the light leaves through the back, against 5% in diamond.","scores_line":"Brilliance 45 · Fire 26 · Scintillation 96 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":61,"t73":70,"difference":-9},"brilliance":{"value":45,"t73":72,"difference":-27},"fire":{"value":26,"t73":36,"difference":-10},"scintillation":{"value":96,"t73":80,"difference":16},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":49,"t73":77,"difference":-28},"tilt":{"value":100,"t73":80,"difference":20}},"pros":[{"point":"Lighter than diamond","figures":"0.71 vs 0.94 ct"},{"point":"Much more sparkle than the T73","figures":"96 vs 80"},{"point":"A little more face for its weight","figures":"106 vs 100"}],"cons":[{"point":"A third of the diamond version's fire","figures":"26 vs 80"},{"point":"Over half the light leaks","figures":"55 vs 5"},{"point":"Under half the diamond version's light","figures":"45 vs 94"}]},{"cut":"old-single","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/old-single","headline":"Old Single Cut Amethyst: a quarter lighter than diamond, though most of its light leaks","summary":"Eight crown facets, eight pavilion facets and a steep 48.48° pavilion: in quartz that plan lets nearly four-fifths of the light out of the back.","scores_line":"Brilliance 15 · Fire 38 · Scintillation 44 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":45,"t73":70,"difference":-25},"brilliance":{"value":15,"t73":72,"difference":-57},"fire":{"value":38,"t73":36,"difference":2},"scintillation":{"value":44,"t73":80,"difference":-36},"spread":{"value":97,"t73":100,"difference":-3},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":16,"t73":77,"difference":-61},"tilt":{"value":100,"t73":80,"difference":20}},"pros":[{"point":"A quarter lighter than diamond","figures":"0.79 vs 1.05 ct"}],"cons":[{"point":"Nearly four-fifths of the light leaks","figures":"79 vs 19"},{"point":"A fifth of the T73's light","figures":"15 vs 72"},{"point":"Under half the diamond version's fire","figures":"38 vs 84"},{"point":"Far less sparkle than the T73","figures":"44 vs 80"}]},{"cut":"oval","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/oval","headline":"Oval Cut Amethyst: the most fire of any cut we measure in quartz","summary":"The oval has more fire than any other cut we measure in amethyst: 69 against 36 for the T73, with Brilliance 52.","scores_line":"Brilliance 52 · Fire 69 · Scintillation 87 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":68,"t73":70,"difference":-2},"brilliance":{"value":52,"t73":72,"difference":-20},"fire":{"value":69,"t73":36,"difference":33},"scintillation":{"value":87,"t73":80,"difference":7},"spread":{"value":99,"t73":100,"difference":-1},"symmetry":{"value":98,"t73":100,"difference":-2},"shape_norm":{"value":61,"t73":77,"difference":-16},"tilt":{"value":74,"t73":80,"difference":-6}},"pros":[{"point":"Nearly twice the round's fire","figures":"69 vs 36"},{"point":"Lighter than diamond","figures":"1.07 vs 1.42 ct"},{"point":"More face for its weight than the T73","figures":"108 vs 100"},{"point":"A little more sparkle than the T73","figures":"87 vs 80"}],"cons":[{"point":"Less light than the T73","figures":"52 vs 72"},{"point":"Holds less light when tipped than in diamond","figures":"74 vs 92"},{"point":"More leakage than the diamond oval","figures":"43 vs 27"}]},{"cut":"teardrop","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/teardrop","headline":"Teardrop Cut Amethyst: a bigger face per carat than a round, a quarter lighter than diamond","summary":"A softened pear in quartz: more face for its weight and more fire than the T73, less light, and one of the least steady stones we measure in amethyst when it tips.","scores_line":"Brilliance 49 · Fire 60 · Scintillation 81 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":62,"t73":70,"difference":-8},"brilliance":{"value":49,"t73":72,"difference":-23},"fire":{"value":60,"t73":36,"difference":24},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":98,"t73":100,"difference":-2},"shape_norm":{"value":57,"t73":77,"difference":-20},"tilt":{"value":56,"t73":80,"difference":-24}},"pros":[{"point":"A quarter lighter than diamond","figures":"0.96 vs 1.28 ct"},{"point":"One of the largest faces for its weight","figures":"116 vs 100"}],"cons":[{"point":"Less fire than the diamond teardrop","figures":"60 vs 89"},{"point":"Loses light when tipped","figures":"56 vs 80"},{"point":"Less light than the T73","figures":"49 vs 72"},{"point":"More leakage than the T73","figures":"41 vs 28"}]},{"cut":"pear","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/pear","headline":"Pear Cut Amethyst: far more fire than a round, and lighter in weight than diamond","summary":"In amethyst the pear splits a far larger share of its returned light into colour than a round, 60 against 36, and gives back nearly the same light as a diamond pear.","scores_line":"Brilliance 52 · Fire 60 · Scintillation 76 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":61,"t73":70,"difference":-9},"brilliance":{"value":52,"t73":72,"difference":-20},"fire":{"value":60,"t73":36,"difference":24},"scintillation":{"value":76,"t73":80,"difference":-4},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":85,"t73":100,"difference":-15},"shape_norm":{"value":60,"t73":77,"difference":-17},"tilt":{"value":57,"t73":80,"difference":-23}},"pros":[{"point":"Lighter than diamond","figures":"1.03 vs 1.37 ct"},{"point":"Far more fire than a round","figures":"60 vs 36"},{"point":"A larger face for its weight than a round","figures":"115 vs 100"}],"cons":[{"point":"Loses light when tipped","figures":"57 vs 80"},{"point":"Less light than the T73","figures":"52 vs 72"},{"point":"More leakage than the diamond pear","figures":"39 vs 22"},{"point":"A less regular pavilion","figures":"85 vs 100"}]},{"cut":"asscher","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/asscher","headline":"Asscher Cut Amethyst: a stepped square, a quarter lighter than diamond at the same size","summary":"The stepped square in quartz: about a round's face for its weight, a head-on Light Return map nearly half grey against the round's seventh, and less fire than the diamond version.","scores_line":"Brilliance 60 · Fire 52 · Scintillation 72 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":68,"t73":70,"difference":-2},"brilliance":{"value":60,"t73":72,"difference":-12},"fire":{"value":52,"t73":36,"difference":16},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":107,"t73":100,"difference":7},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":79,"t73":77,"difference":2},"tilt":{"value":84,"t73":80,"difference":4}},"pros":[{"point":"Lighter than diamond","figures":"1.01 vs 1.34 ct"}],"cons":[{"point":"Much less fire than in diamond","figures":"52 vs 80"},{"point":"Much more leakage than in diamond","figures":"39 vs 11"},{"point":"Less light than the T73","figures":"60 vs 72"},{"point":"Fewer flashes than a round","figures":"72 vs 80"}]},{"cut":"trillion","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/trillion","headline":"Trillion Cut Amethyst: lighter than diamond, and leaking barely more than a round","summary":"A shallow, three-sided brilliant that leaks barely more than the T73 does in quartz and faces up just as large for its weight. Its catches are less light than the T73, 60 against 72, and half the diamond trillion's fire.","scores_line":"Brilliance 60 · Fire 44 · Scintillation 80 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":68,"t73":70,"difference":-2},"brilliance":{"value":60,"t73":72,"difference":-12},"fire":{"value":44,"t73":36,"difference":8},"scintillation":{"value":80,"t73":80,"difference":0},"spread":{"value":107,"t73":100,"difference":7},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":70,"t73":77,"difference":-7},"tilt":{"value":88,"t73":80,"difference":8}},"pros":[{"point":"A quarter lighter than diamond","figures":"0.60 vs 0.80 ct"}],"cons":[{"point":"Half the diamond version's fire","figures":"44 vs 87"},{"point":"More leakage than in diamond","figures":"30 vs 13"},{"point":"Less light than the T73","figures":"60 vs 72"}]},{"cut":"cushion","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/cushion","headline":"Cushion Cut Amethyst: more sparkle than the T73, and the most light of any square shape we measure in quartz","summary":"Of the square outlines we measure in quartz, the cushion returns the most light: Brilliance 69, against 72 for the round. Fire is what it gives up.","scores_line":"Brilliance 69 · Fire 24 · Scintillation 85 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":64,"t73":70,"difference":-6},"brilliance":{"value":69,"t73":72,"difference":-3},"fire":{"value":24,"t73":36,"difference":-12},"scintillation":{"value":85,"t73":80,"difference":5},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":97,"t73":100,"difference":-3},"shape_norm":{"value":80,"t73":77,"difference":3},"tilt":{"value":67,"t73":80,"difference":-13}},"pros":[{"point":"Lighter than diamond","figures":"0.96 vs 1.27 ct"},{"point":"More sparkle than the T73","figures":"85 vs 80"}],"cons":[{"point":"A third of the diamond cushion's fire","figures":"24 vs 73"},{"point":"Loses more light when tipped","figures":"67 vs 92"},{"point":"More leakage than in diamond","figures":"31 vs 9"},{"point":"Less light than the diamond cushion","figures":"69 vs 80"}]},{"cut":"square","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/square","headline":"Square Cut Amethyst: a square brilliant, a quarter lighter in weight than diamond","summary":"The square counterpart of the round brilliant: in quartz it leaks barely more than the T73, and returns less light.","scores_line":"Brilliance 65 · Fire 34 · Scintillation 78 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":67,"t73":70,"difference":-3},"brilliance":{"value":65,"t73":72,"difference":-7},"fire":{"value":34,"t73":36,"difference":-2},"scintillation":{"value":78,"t73":80,"difference":-2},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":86,"t73":77,"difference":9},"tilt":{"value":84,"t73":80,"difference":4}},"pros":[{"point":"A quarter lighter than diamond","figures":"0.86 vs 1.14 ct"}],"cons":[{"point":"Under half the diamond's fire","figures":"34 vs 72"},{"point":"Less light than the diamond square","figures":"65 vs 85"},{"point":"More leakage than in diamond","figures":"29 vs 10"}]},{"cut":"trilliant","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/trilliant","headline":"Trilliant Cut Amethyst: a three-sided brilliant, lighter in weight than diamond","summary":"Straight sides and sharp corners. In amethyst it is a little brighter than the trillion, and leakier.","scores_line":"Brilliance 63 · Fire 34 · Scintillation 79 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":61,"t73":70,"difference":-9},"brilliance":{"value":63,"t73":72,"difference":-9},"fire":{"value":34,"t73":36,"difference":-2},"scintillation":{"value":79,"t73":80,"difference":-1},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":62,"t73":100,"difference":-38},"shape_norm":{"value":74,"t73":77,"difference":-3},"tilt":{"value":76,"t73":80,"difference":-4}},"pros":[{"point":"Lighter than diamond","figures":"0.72 vs 0.96 ct"}],"cons":[{"point":"Far less fire than the diamond version","figures":"34 vs 83"},{"point":"An irregular pavilion","figures":"62 vs 100"},{"point":"More leakage than in diamond","figures":"36 vs 11"},{"point":"Less light than the diamond trilliant","figures":"63 vs 78"}]},{"cut":"emerald-square","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/emerald-square","headline":"Emerald Square Cut Amethyst: an open-table step cut, a quarter lighter than diamond","summary":"A square step cut with an open table: in quartz it faces up about as large as a round for its weight, 99 against 100, and leaks 36% of its light.","scores_line":"Brilliance 61 · Fire 40 · Scintillation 72 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":65,"t73":70,"difference":-5},"brilliance":{"value":61,"t73":72,"difference":-11},"fire":{"value":40,"t73":36,"difference":4},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":108,"t73":100,"difference":8},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":80,"t73":77,"difference":3},"tilt":{"value":78,"t73":80,"difference":-2}},"pros":[{"point":"Lighter than diamond","figures":"1.10 vs 1.46 ct"}],"cons":[{"point":"Under half the diamond's fire","figures":"40 vs 84"},{"point":"More leakage than in diamond","figures":"36 vs 17"},{"point":"Less light than the T73","figures":"61 vs 72"},{"point":"Fewer flashes than a round","figures":"72 vs 80"}]},{"cut":"marquise","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/marquise","headline":"Marquise Cut Amethyst: the largest face for its weight we measure, level with the rectangle","summary":"Two points and a long, shallow pavilion: in quartz the marquise faces up as large for its weight as any cut we measure, and sparkles, but well over half its light leaves through the back.","scores_line":"Brilliance 38 · Fire 48 · Scintillation 86 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":56,"t73":70,"difference":-14},"brilliance":{"value":38,"t73":72,"difference":-34},"fire":{"value":48,"t73":36,"difference":12},"scintillation":{"value":86,"t73":80,"difference":6},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":94,"t73":100,"difference":-6},"shape_norm":{"value":44,"t73":77,"difference":-33},"tilt":{"value":71,"t73":80,"difference":-9}},"pros":[{"point":"Lighter than diamond","figures":"1.57 vs 2.09 ct"},{"point":"Tied for the largest face per carat we measure","figures":"121 vs 100"},{"point":"A little more sparkle than the T73","figures":"86 vs 80"}],"cons":[{"point":"Well over half the light leaks","figures":"59 vs 17"},{"point":"About half the diamond marquise's fire","figures":"48 vs 89"},{"point":"About half the T73's light","figures":"38 vs 72"},{"point":"Loses more light when tipped","figures":"71 vs 87"}]},{"cut":"baguette","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/baguette","headline":"Baguette Cut Diamond: a slim step cut with a little more face for its weight","summary":"Long, narrow and plainly faceted: the baguette faces up a little larger than the T73 for its weight, and returns less than half of a round's light.","scores_line":"Brilliance 40 · Fire 62 · Scintillation 43 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":57,"t73":90,"difference":-33},"brilliance":{"value":40,"t73":93,"difference":-53},"fire":{"value":62,"t73":78,"difference":-16},"scintillation":{"value":43,"t73":80,"difference":-37},"spread":{"value":97,"t73":100,"difference":-3},"symmetry":{"value":39,"t73":100,"difference":-61},"shape_norm":{"value":53,"t73":100,"difference":-47},"tilt":{"value":100,"t73":92,"difference":8}},"pros":[{"point":"A little more face for its weight","figures":"108 vs 100"}],"cons":[{"point":"The least regular pavilion we measure","figures":"39 vs 100"},{"point":"Less than half a round's light","figures":"40 vs 93"},{"point":"Few flashes as it moves","figures":"43 vs 80"},{"point":"More than a third of the light leaks","figures":"38 vs 2"}]},{"cut":"emerald-cut","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/emerald-cut","headline":"Emerald Cut Diamond: more fire than a round, and a slightly larger face for its weight","summary":"Long steps and cropped corners: the emerald cut gives diamond more fire than the T73 and a slightly larger face for its weight, and loses a good deal of light.","scores_line":"Brilliance 55 · Fire 87 · Scintillation 72 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":70,"t73":90,"difference":-20},"brilliance":{"value":55,"t73":93,"difference":-38},"fire":{"value":87,"t73":78,"difference":9},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":64,"t73":100,"difference":-36},"shape_norm":{"value":73,"t73":100,"difference":-27},"tilt":{"value":83,"t73":92,"difference":-9}},"pros":[{"point":"More fire than a round","figures":"87 vs 78"},{"point":"A slightly larger face for its weight","figures":"105 vs 100"}],"cons":[{"point":"Much less light than a round","figures":"55 vs 93"},{"point":"A less regular pavilion","figures":"64 vs 100"},{"point":"A quarter of the light leaks","figures":"25 vs 2"},{"point":"Darkens more when tipped","figures":"83 vs 92"}]},{"cut":"pear","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/pear","headline":"Pear Cut Diamond: a larger face for its weight, with extra fire","summary":"One rounded end, one point: the pear faces up larger than the T73 for its weight and shows more fire, while letting more than a fifth of its light out of the back.","scores_line":"Brilliance 53 · Fire 84 · Scintillation 76 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":72,"t73":90,"difference":-18},"brilliance":{"value":53,"t73":93,"difference":-40},"fire":{"value":84,"t73":78,"difference":6},"scintillation":{"value":76,"t73":80,"difference":-4},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":85,"t73":100,"difference":-15},"shape_norm":{"value":62,"t73":100,"difference":-38},"tilt":{"value":80,"t73":92,"difference":-12}},"pros":[{"point":"More face for its weight","figures":"115 vs 100"},{"point":"More fire than a round","figures":"84 vs 78"}],"cons":[{"point":"Little more than half a round's light","figures":"53 vs 93"},{"point":"More than a fifth of the light leaks","figures":"22 vs 2"},{"point":"A less regular pavilion","figures":"85 vs 100"},{"point":"Keeps less light when tipped","figures":"80 vs 92"}]},{"cut":"radiant","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/radiant","headline":"Radiant Cut Diamond: one of the largest faces for its weight we measure","summary":"A brilliant facet plan on a cropped rectangle. Our radiant faces up far larger than the T73 for its weight, and in diamond it returns about a third of the light.","scores_line":"Brilliance 32 · Fire 77 · Scintillation 74 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":65,"t73":90,"difference":-25},"brilliance":{"value":32,"t73":93,"difference":-61},"fire":{"value":77,"t73":78,"difference":-1},"scintillation":{"value":74,"t73":80,"difference":-6},"spread":{"value":105,"t73":100,"difference":5},"symmetry":{"value":99,"t73":100,"difference":-1},"shape_norm":{"value":37,"t73":100,"difference":-63},"tilt":{"value":100,"t73":92,"difference":8}},"pros":[{"point":"A much larger face for its weight","figures":"118 vs 100"}],"cons":[{"point":"About a third of a round's light","figures":"32 vs 93"},{"point":"Two-fifths of the light leaks","figures":"41 vs 2"},{"point":"Slightly fewer flashes","figures":"74 vs 80"}]},{"cut":"rectangle","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/rectangle","headline":"Rectangle Cut Diamond: the largest face for its weight we measure, level with the marquise","summary":"A plain rectangular step cut with square corners. It ties with the marquise for the largest face for its weight we measure in diamond, and returns about half of a round's light.","scores_line":"Brilliance 50 · Fire 77 · Scintillation 63 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":69,"t73":90,"difference":-21},"brilliance":{"value":50,"t73":93,"difference":-43},"fire":{"value":77,"t73":78,"difference":-1},"scintillation":{"value":63,"t73":80,"difference":-17},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":66,"t73":100,"difference":-34},"tilt":{"value":85,"t73":92,"difference":-7}},"pros":[{"point":"Level with the marquise for the largest face for its weight we measure","figures":"121 vs 100"}],"cons":[{"point":"About half a round's light","figures":"50 vs 93"},{"point":"Nearly a third of the light leaks","figures":"32 vs 2"},{"point":"Fewer flashes than a round","figures":"63 vs 80"},{"point":"Keeps a little less light when tipped","figures":"85 vs 92"}]},{"cut":"teardrop","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/teardrop","headline":"Teardrop Cut Diamond: more fire and a larger face for its weight than a round","summary":"A pear with a fuller shoulder: in diamond it shows more fire than the T73 and faces up larger for its weight, and returns about half of a round's light.","scores_line":"Brilliance 46 · Fire 89 · Scintillation 81 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":71,"t73":90,"difference":-19},"brilliance":{"value":46,"t73":93,"difference":-47},"fire":{"value":89,"t73":78,"difference":11},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":98,"t73":100,"difference":-2},"shape_norm":{"value":54,"t73":100,"difference":-46},"tilt":{"value":80,"t73":92,"difference":-12}},"pros":[{"point":"A larger face for its weight","figures":"116 vs 100"},{"point":"Much more fire than a round","figures":"89 vs 78"}],"cons":[{"point":"About half a round's light","figures":"46 vs 93"},{"point":"More than a quarter of the light leaks","figures":"28 vs 2"},{"point":"Loses more light when tipped","figures":"80 vs 92"}]},{"cut":"princess","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/princess","headline":"Princess Cut Diamond: more fire than a round, in a sharp-cornered square","summary":"The square brilliant with pointed corners and chevron pavilion facets. In diamond it shows a little more fire than the T73 and much less light.","scores_line":"Brilliance 57 · Fire 83 · Scintillation 78 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":76,"t73":90,"difference":-14},"brilliance":{"value":57,"t73":93,"difference":-36},"fire":{"value":83,"t73":78,"difference":5},"scintillation":{"value":78,"t73":80,"difference":-2},"spread":{"value":95,"t73":100,"difference":-5},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":89,"t73":100,"difference":-11},"tilt":{"value":89,"t73":92,"difference":-3}},"pros":[{"point":"A little more fire than a round","figures":"83 vs 78"}],"cons":[{"point":"Much less light than a round","figures":"57 vs 93"},{"point":"Nearly a fifth of the light leaks","figures":"18 vs 2"},{"point":"Keeps a little less light when tipped","figures":"89 vs 92"}]},{"cut":"radiant-square","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/radiant-square","headline":"Radiant Square Cut Diamond: more light than a princess, less fire than a round","summary":"Cropped corners over a brilliant pavilion, on a square. In diamond it beats the T73 on nothing we count, and trails it on light, fire, sparkle and leakage.","scores_line":"Brilliance 72 · Fire 62 · Scintillation 66 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":77,"t73":90,"difference":-13},"brilliance":{"value":72,"t73":93,"difference":-21},"fire":{"value":62,"t73":78,"difference":-16},"scintillation":{"value":66,"t73":80,"difference":-14},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":84,"t73":100,"difference":-16},"tilt":{"value":90,"t73":92,"difference":-2}},"pros":[],"cons":[{"point":"Less light than a round","figures":"72 vs 93"},{"point":"Much less fire","figures":"62 vs 78"},{"point":"Fewer flashes than a round","figures":"66 vs 80"},{"point":"About an eighth of the light leaks","figures":"12 vs 2"}]},{"cut":"triangle","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/triangle","headline":"Triangle Cut Diamond: more fire than a round, with the fewest facets we measure","summary":"An equilateral triangle with 19 facets and nothing spare. In diamond it shows more fire than the T73 and trails it on four counts.","scores_line":"Brilliance 53 · Fire 86 · Scintillation 34 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":71,"t73":90,"difference":-19},"brilliance":{"value":53,"t73":93,"difference":-40},"fire":{"value":86,"t73":78,"difference":8},"scintillation":{"value":34,"t73":80,"difference":-46},"spread":{"value":104,"t73":100,"difference":4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":69,"t73":100,"difference":-31},"tilt":{"value":94,"t73":92,"difference":2}},"pros":[{"point":"More fire than a round","figures":"86 vs 78"}],"cons":[{"point":"The fewest flashes we measure","figures":"34 vs 80"},{"point":"Little more than half a round's light","figures":"53 vs 93"},{"point":"A quarter of the light leaks","figures":"25 vs 2"},{"point":"The smallest face for its weight we measure","figures":"89 vs 100"}]},{"cut":"hexagon","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/hexagon","headline":"Hexagon Cut Diamond: more fire than a round, in six straight sides","summary":"Six straight sides, a stepped crown and a tiered pavilion. In diamond it shows more fire than the T73 and gives up much of a round's light and sparkle.","scores_line":"Brilliance 58 · Fire 85 · Scintillation 56 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":76,"t73":90,"difference":-14},"brilliance":{"value":58,"t73":93,"difference":-35},"fire":{"value":85,"t73":78,"difference":7},"scintillation":{"value":56,"t73":80,"difference":-24},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":77,"t73":100,"difference":-23},"tilt":{"value":100,"t73":92,"difference":8}},"pros":[{"point":"More fire than a round","figures":"85 vs 78"}],"cons":[{"point":"Much less light than a round","figures":"58 vs 93"},{"point":"Fewer flashes than a round","figures":"56 vs 80"},{"point":"Nearly a quarter of the light leaks","figures":"24 vs 2"},{"point":"Slightly smaller for its weight","figures":"96 vs 100"}]},{"cut":"octagon","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/octagon","headline":"Octagon Cut Diamond: the most light of the stepped cuts we measure in this stone, still short of a round","summary":"Steps above the girdle, three tiers below it, eight sides around. In diamond it returns the most light of our stepped cuts, 71, level by our margins with the Asscher's 69, and still beats the T73 on nothing we count.","scores_line":"Brilliance 71 · Fire 76 · Scintillation 66 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":80,"t73":90,"difference":-10},"brilliance":{"value":71,"t73":93,"difference":-22},"fire":{"value":76,"t73":78,"difference":-2},"scintillation":{"value":66,"t73":80,"difference":-14},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":94,"t73":100,"difference":-6},"tilt":{"value":97,"t73":92,"difference":5}},"pros":[],"cons":[{"point":"Less light than a round","figures":"71 vs 93"},{"point":"Nearly a fifth of the light leaks","figures":"18 vs 2"},{"point":"Fewer flashes than a round","figures":"66 vs 80"},{"point":"Slightly smaller for its weight","figures":"95 vs 100"}]},{"cut":"dg-bowtie","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/dg-bowtie","headline":"DG-Bowtie Diamond: a touch more sparkle and fire than a round, at a heavy cost in light","summary":"A marquise outline cut nearly as deep as it is wide. It sparkles a little more than the T73 and shows a little more fire, and returns less than a third of a round's light.","scores_line":"Brilliance 27 · Fire 82 · Scintillation 86 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":63,"t73":90,"difference":-27},"brilliance":{"value":27,"t73":93,"difference":-66},"fire":{"value":82,"t73":78,"difference":4},"scintillation":{"value":86,"t73":80,"difference":6},"spread":{"value":87,"t73":100,"difference":-13},"symmetry":{"value":94,"t73":100,"difference":-6},"shape_norm":{"value":31,"t73":100,"difference":-69},"tilt":{"value":83,"t73":92,"difference":-9}},"pros":[{"point":"A little more sparkle than a round","figures":"86 vs 80"},{"point":"A touch more fire than a round","figures":"82 vs 78"}],"cons":[{"point":"Less than a third of a round's light","figures":"27 vs 93"},{"point":"More than a third of the light leaks","figures":"36 vs 2"},{"point":"Keeps less light when tipped","figures":"83 vs 92"},{"point":"Smaller for its weight than a round","figures":"92 vs 100"}]},{"cut":"dg-elongated-hexagon","gemstone":"diamond","url":"https://digitalgemology.com/gemstones/diamond/dg-elongated-hexagon","headline":"DG-Elongated Hexagon Diamond: the most fire we measure in this stone, from very little light","summary":"A long, double-sided step cut. In diamond it has the most fire we measure and returns less light than any other cut; its back is a window by design, and the census counts that light as lost.","scores_line":"Brilliance 12 · Fire 97 · Scintillation 51 · in our census, where the T73 scores 93 · 78 · 80 in diamond","scores":{"global":{"value":55,"t73":90,"difference":-35},"brilliance":{"value":12,"t73":93,"difference":-81},"fire":{"value":97,"t73":78,"difference":19},"scintillation":{"value":51,"t73":80,"difference":-29},"spread":{"value":111,"t73":100,"difference":11},"symmetry":{"value":73,"t73":100,"difference":-27},"shape_norm":{"value":16,"t73":100,"difference":-84},"tilt":{"value":100,"t73":92,"difference":8}},"pros":[{"point":"The most fire we measure in diamond","figures":"97 vs 78"},{"point":"A larger face for its weight","figures":"107 vs 100"}],"cons":[{"point":"The least light we measure in diamond","figures":"12 vs 93"},{"point":"Nearly three-quarters of the light leaks","figures":"73 vs 2"},{"point":"Fewer flashes than a round","figures":"51 vs 80"},{"point":"A less regular back","figures":"73 vs 100"}]},{"cut":"baguette","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/baguette","headline":"Baguette Cut Moissanite: more face for its weight than a round, and lighter than diamond","summary":"A slim step cut with only 21 facets: in moissanite it weighs less than a diamond baguette and shows a little more face for its weight than a round, while returning far less light.","scores_line":"Brilliance 32 · Fire 75 · Scintillation 43 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":56,"t73":91,"difference":-35},"brilliance":{"value":32,"t73":86,"difference":-54},"fire":{"value":75,"t73":97,"difference":-22},"scintillation":{"value":43,"t73":80,"difference":-37},"spread":{"value":97,"t73":100,"difference":-3},"symmetry":{"value":39,"t73":100,"difference":-61},"shape_norm":{"value":42,"t73":93,"difference":-51},"tilt":{"value":100,"t73":94,"difference":6}},"pros":[{"point":"Lighter than a diamond baguette","figures":"3.33 vs 3.64 ct"},{"point":"A little more face for its weight than a round","figures":"108 vs 100"}],"cons":[{"point":"The least regular pavilion we measure","figures":"39 vs 100"},{"point":"Far less light than a round","figures":"32 vs 86"},{"point":"Few flashes as it moves","figures":"43 vs 80"},{"point":"Over two fifths of the light leaks","figures":"42 vs 7"}]},{"cut":"emerald-cut","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/emerald-cut","headline":"Emerald Cut Moissanite: more fire than a diamond emerald cut, in a lighter stone","summary":"Long steps, cropped corners and an open table: in moissanite the emerald cut scores higher for fire than in diamond (95 against 87), and trails the T73 on light (51 against 86) and on tilt (82 against 94).","scores_line":"Brilliance 51 · Fire 95 · Scintillation 72 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":70,"t73":91,"difference":-21},"brilliance":{"value":51,"t73":86,"difference":-35},"fire":{"value":95,"t73":97,"difference":-2},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":64,"t73":100,"difference":-36},"shape_norm":{"value":67,"t73":93,"difference":-26},"tilt":{"value":82,"t73":94,"difference":-12}},"pros":[{"point":"Lighter than a diamond emerald cut","figures":"2.12 vs 2.31 ct"},{"point":"More fire than in diamond","figures":"95 vs 87"},{"point":"Slightly larger for its weight than a round","figures":"105 vs 100"}],"cons":[{"point":"A less regular pavilion","figures":"64 vs 100"},{"point":"Much less light than a round","figures":"51 vs 86"},{"point":"More leakage than a round","figures":"27 vs 7"},{"point":"Keeps less light when tipped","figures":"82 vs 94"}]},{"cut":"oval","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/oval","headline":"Oval Cut Moissanite: a larger face for its weight than a round, and more sparkle than the T73","summary":"An elongated brilliant with 93 facets: in moissanite it shows more face for its weight and more sparkle than a round, and returns well under half the round's light.","scores_line":"Brilliance 38 · Fire 95 · Scintillation 87 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":73,"t73":91,"difference":-18},"brilliance":{"value":38,"t73":86,"difference":-48},"fire":{"value":95,"t73":97,"difference":-2},"scintillation":{"value":87,"t73":80,"difference":7},"spread":{"value":99,"t73":100,"difference":-1},"symmetry":{"value":98,"t73":100,"difference":-2},"shape_norm":{"value":45,"t73":93,"difference":-48},"tilt":{"value":97,"t73":94,"difference":3}},"pros":[{"point":"Lighter than a diamond oval","figures":"1.30 vs 1.42 ct"},{"point":"Larger for its weight than a round","figures":"108 vs 100"},{"point":"More sparkle than a round","figures":"87 vs 80"},{"point":"A little more fire than in diamond","figures":"95 vs 92"}],"cons":[{"point":"Much less light than a round","figures":"38 vs 86"},{"point":"A third of the light leaks","figures":"33 vs 7"}]},{"cut":"pear","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/pear","headline":"Pear Cut Moissanite: faces up larger than a round of the same weight","summary":"Half oval, half marquise: the pear in moissanite gives a lot of face for its weight and more fire than the diamond pear, with a little over half a round's light.","scores_line":"Brilliance 49 · Fire 95 · Scintillation 76 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":73,"t73":91,"difference":-18},"brilliance":{"value":49,"t73":86,"difference":-37},"fire":{"value":95,"t73":97,"difference":-2},"scintillation":{"value":76,"t73":80,"difference":-4},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":85,"t73":100,"difference":-15},"shape_norm":{"value":57,"t73":93,"difference":-36},"tilt":{"value":83,"t73":94,"difference":-11}},"pros":[{"point":"Much larger for its weight than a round","figures":"115 vs 100"},{"point":"More fire than a diamond pear","figures":"95 vs 84"},{"point":"Lighter than in diamond","figures":"1.25 vs 1.37 ct"}],"cons":[{"point":"Less light than a round","figures":"49 vs 86"},{"point":"A less regular pavilion","figures":"85 vs 100"},{"point":"More leakage than a round","figures":"22 vs 7"},{"point":"Keeps less light when tipped","figures":"83 vs 94"}]},{"cut":"radiant","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/radiant","headline":"Radiant Cut Moissanite: one of the largest faces for its weight that we measure","summary":"A cropped rectangle carrying a brilliant plan: in moissanite the radiant gives a big face for its weight and far more fire than in diamond, and very little light.","scores_line":"Brilliance 33 · Fire 92 · Scintillation 74 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":69,"t73":91,"difference":-22},"brilliance":{"value":33,"t73":86,"difference":-53},"fire":{"value":92,"t73":97,"difference":-5},"scintillation":{"value":74,"t73":80,"difference":-6},"spread":{"value":105,"t73":100,"difference":5},"symmetry":{"value":99,"t73":100,"difference":-1},"shape_norm":{"value":39,"t73":93,"difference":-54},"tilt":{"value":100,"t73":94,"difference":6}},"pros":[{"point":"Among the largest faces for the weight","figures":"118 vs 100"},{"point":"Far more fire than a diamond radiant","figures":"92 vs 77"},{"point":"Lighter than in diamond","figures":"1.43 vs 1.56 ct"}],"cons":[{"point":"Very little light for a brilliant","figures":"33 vs 86"},{"point":"Over a third of the light leaks","figures":"37 vs 7"},{"point":"Slightly fewer flashes than a round","figures":"74 vs 80"}]},{"cut":"rectangle","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/rectangle","headline":"Rectangle Cut Moissanite: as much face for its weight as any cut we measure","summary":"Square corners and wide steps: in moissanite the rectangle covers as much area for its weight as any cut we measure, with little more than half a round's light.","scores_line":"Brilliance 50 · Fire 90 · Scintillation 63 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":72,"t73":91,"difference":-19},"brilliance":{"value":50,"t73":86,"difference":-36},"fire":{"value":90,"t73":97,"difference":-7},"scintillation":{"value":63,"t73":80,"difference":-17},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":66,"t73":93,"difference":-27},"tilt":{"value":86,"t73":94,"difference":-8}},"pros":[{"point":"As much face for its weight as any cut we measure","figures":"121 vs 100"},{"point":"More fire than a diamond rectangle","figures":"90 vs 77"},{"point":"Lighter than in diamond","figures":"1.92 vs 2.10 ct"}],"cons":[{"point":"Little more than half a round's light","figures":"50 vs 86"},{"point":"More leakage than a round","figures":"29 vs 7"},{"point":"Fewer flashes than a round","figures":"63 vs 80"},{"point":"Keeps a little less light when tipped","figures":"86 vs 94"}]},{"cut":"teardrop","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/teardrop","headline":"Teardrop Cut Moissanite: a generous face for its weight, with strong fire","summary":"A pear with fuller shoulders and a softer point: in moissanite it shows a big face for its weight and fire close to the T73's, and much less light.","scores_line":"Brilliance 39 · Fire 96 · Scintillation 81 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":71,"t73":91,"difference":-20},"brilliance":{"value":39,"t73":86,"difference":-47},"fire":{"value":96,"t73":97,"difference":-1},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":98,"t73":100,"difference":-2},"shape_norm":{"value":45,"t73":93,"difference":-48},"tilt":{"value":86,"t73":94,"difference":-8}},"pros":[{"point":"Much larger for its weight than a round","figures":"116 vs 100"},{"point":"Lighter than a diamond teardrop","figures":"1.17 vs 1.28 ct"},{"point":"More fire than in diamond","figures":"96 vs 89"}],"cons":[{"point":"Much less light than a round","figures":"39 vs 86"},{"point":"More leakage than a round","figures":"29 vs 7"},{"point":"Keeps a little less when tipped","figures":"86 vs 94"}]},{"cut":"emerald-square","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/emerald-square","headline":"Emerald Square Cut Moissanite: more fire than in diamond, in concentric square steps","summary":"Concentric steps on a square with cropped corners: in moissanite this cut gains fire over diamond, and trails a round on light, tilt, leakage and sparkle.","scores_line":"Brilliance 58 · Fire 93 · Scintillation 72 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":77,"t73":91,"difference":-14},"brilliance":{"value":58,"t73":86,"difference":-28},"fire":{"value":93,"t73":97,"difference":-4},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":108,"t73":100,"difference":8},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":76,"t73":93,"difference":-17},"tilt":{"value":82,"t73":94,"difference":-12}},"pros":[{"point":"More fire than a diamond emerald square","figures":"93 vs 84"},{"point":"Lighter than in diamond","figures":"1.33 vs 1.46 ct"}],"cons":[{"point":"Less light than a round","figures":"58 vs 86"},{"point":"Darker when tipped","figures":"82 vs 94"},{"point":"More than twice a round's leakage","figures":"17 vs 7"},{"point":"Slightly fewer flashes","figures":"72 vs 80"}]},{"cut":"princess","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/princess","headline":"Princess Cut Moissanite: far more fire than a diamond princess","summary":"The square brilliant with sharp corners and a chevron pavilion: in moissanite it scores far higher for fire than in diamond, and returns well under a round's light.","scores_line":"Brilliance 51 · Fire 95 · Scintillation 78 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":78,"t73":91,"difference":-13},"brilliance":{"value":51,"t73":86,"difference":-35},"fire":{"value":95,"t73":97,"difference":-2},"scintillation":{"value":78,"t73":80,"difference":-2},"spread":{"value":95,"t73":100,"difference":-5},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":80,"t73":93,"difference":-13},"tilt":{"value":95,"t73":94,"difference":1}},"pros":[{"point":"Far more fire than a diamond princess","figures":"95 vs 83"},{"point":"Lighter than in diamond","figures":"1.35 vs 1.48 ct"}],"cons":[{"point":"Much less light than a round","figures":"51 vs 86"},{"point":"More leakage than a round","figures":"17 vs 7"}]},{"cut":"triangle","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/triangle","headline":"Triangle Cut Moissanite: strong fire in a simple three-sided plan","summary":"Two crown tiers over three pavilion tiers, and nothing spare: in moissanite the triangle scores high for fire, and has the fewest flashes of any cut we measure.","scores_line":"Brilliance 52 · Fire 96 · Scintillation 34 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":73,"t73":91,"difference":-18},"brilliance":{"value":52,"t73":86,"difference":-34},"fire":{"value":96,"t73":97,"difference":-1},"scintillation":{"value":34,"t73":80,"difference":-46},"spread":{"value":104,"t73":100,"difference":4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":69,"t73":93,"difference":-24},"tilt":{"value":93,"t73":94,"difference":-1}},"pros":[{"point":"More fire than a diamond triangle","figures":"96 vs 86"},{"point":"Lighter than in diamond","figures":"0.72 vs 0.79 ct"}],"cons":[{"point":"The fewest flashes we measure","figures":"34 vs 80"},{"point":"Less light than a round","figures":"52 vs 86"},{"point":"A fifth of the light leaks","figures":"20 vs 7"},{"point":"The smallest face for its weight we measure","figures":"89 vs 100"}]},{"cut":"hexagon","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/hexagon","headline":"Hexagon Cut Moissanite: fire level with the modern round, far above the diamond hexagon","summary":"Six sides, a stepped crown and a tiered pavilion: in moissanite the hexagon matches the round for fire, and returns about two thirds of its light.","scores_line":"Brilliance 57 · Fire 97 · Scintillation 56 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":78,"t73":91,"difference":-13},"brilliance":{"value":57,"t73":86,"difference":-29},"fire":{"value":97,"t73":97,"difference":0},"scintillation":{"value":56,"t73":80,"difference":-24},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":75,"t73":93,"difference":-18},"tilt":{"value":100,"t73":94,"difference":6}},"pros":[{"point":"Far more fire than a diamond hexagon","figures":"97 vs 85"},{"point":"Lighter than in diamond","figures":"1.18 vs 1.29 ct"}],"cons":[{"point":"Less light than a round","figures":"57 vs 86"},{"point":"Fewer flashes than a round","figures":"56 vs 80"},{"point":"Over a quarter of the light leaks","figures":"26 vs 7"},{"point":"Slightly smaller for its weight","figures":"96 vs 100"}]},{"cut":"dg-bowtie","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/dg-bowtie","headline":"DG-Bowtie Moissanite: fire near the top of our scale, in a deep marquise","summary":"A deep marquise design: in moissanite it is one of our fieriest cuts, yet it returns only about a third of a round's light.","scores_line":"Brilliance 29 · Fire 98 · Scintillation 86 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":67,"t73":91,"difference":-24},"brilliance":{"value":29,"t73":86,"difference":-57},"fire":{"value":98,"t73":97,"difference":1},"scintillation":{"value":86,"t73":80,"difference":6},"spread":{"value":87,"t73":100,"difference":-13},"symmetry":{"value":94,"t73":100,"difference":-6},"shape_norm":{"value":34,"t73":93,"difference":-59},"tilt":{"value":77,"t73":94,"difference":-17}},"pros":[{"point":"Far more fire than in diamond","figures":"98 vs 82"},{"point":"Lighter than in diamond","figures":"2.89 vs 3.16 ct"},{"point":"A little more sparkle than a round","figures":"86 vs 80"}],"cons":[{"point":"About a third of a round's light","figures":"29 vs 86"},{"point":"More leakage than a round","figures":"29 vs 7"},{"point":"Holds less light at an angle","figures":"77 vs 94"},{"point":"Smaller for its weight than a round","figures":"92 vs 100"}]},{"cut":"dg-elongated-hexagon","gemstone":"moissanite","url":"https://digitalgemology.com/gemstones/moissanite/dg-elongated-hexagon","headline":"DG-Elongated Hexagon Moissanite: lighter than diamond, with a little more face per carat than a round","summary":"Step cut alike on both faces, with a window at the back by design: in moissanite it is lighter than diamond and a little larger for its weight than a round, and more than half its light leaks.","scores_line":"Brilliance 20 · Fire 93 · Scintillation 51 · in our census, where the T73 scores 86 · 97 · 80 in moissanite","scores":{"global":{"value":54,"t73":91,"difference":-37},"brilliance":{"value":20,"t73":86,"difference":-66},"fire":{"value":93,"t73":97,"difference":-4},"scintillation":{"value":51,"t73":80,"difference":-29},"spread":{"value":111,"t73":100,"difference":11},"symmetry":{"value":73,"t73":100,"difference":-27},"shape_norm":{"value":26,"t73":93,"difference":-67},"tilt":{"value":73,"t73":94,"difference":-21}},"pros":[{"point":"Lighter than in diamond","figures":"1.65 vs 1.80 ct"},{"point":"A little more face for its weight than a round","figures":"107 vs 100"}],"cons":[{"point":"The least light we measure in moissanite","figures":"20 vs 86"},{"point":"More than half the light leaks","figures":"58 vs 7"},{"point":"Fewer flashes than a round","figures":"51 vs 80"},{"point":"Keeps less of its light when tipped","figures":"73 vs 100"}]},{"cut":"baguette","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/baguette","headline":"Baguette Cut Cubic Zirconia: more fire than the same baguette in diamond","summary":"A slim step cut of 21 facets. In CZ it throws far more colour than the diamond baguette, and returns less than half the light of the T73.","scores_line":"Brilliance 46 · Fire 81 · Scintillation 43 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":59,"t73":93,"difference":-34},"brilliance":{"value":46,"t73":98,"difference":-52},"fire":{"value":81,"t73":87,"difference":-6},"scintillation":{"value":43,"t73":80,"difference":-37},"spread":{"value":97,"t73":100,"difference":-3},"symmetry":{"value":39,"t73":100,"difference":-61},"shape_norm":{"value":60,"t73":106,"difference":-46},"tilt":{"value":83,"t73":87,"difference":-4}},"pros":[{"point":"More fire than the diamond baguette","figures":"81 vs 62"},{"point":"More face for its weight than a round","figures":"108 vs 100"}],"cons":[{"point":"Much heavier than a diamond baguette","figures":"5.99 vs 3.64 ct"},{"point":"The least regular pavilion in our CZ census","figures":"39 vs 100"},{"point":"Less than half the T73's light","figures":"46 vs 98"},{"point":"Few flashes as it moves","figures":"43 vs 80"}]},{"cut":"emerald-cut","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/emerald-cut","headline":"Emerald Cut Cubic Zirconia: more fire than a modern round, from a step cut","summary":"Long steps, cropped corners and more fire than the T73 in CZ. A quarter of the light leaks out of the back, and the stone returns about three-fifths of the round's light.","scores_line":"Brilliance 59 · Fire 92 · Scintillation 72 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":72,"t73":93,"difference":-21},"brilliance":{"value":59,"t73":98,"difference":-39},"fire":{"value":92,"t73":87,"difference":5},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":64,"t73":100,"difference":-36},"shape_norm":{"value":77,"t73":106,"difference":-29},"tilt":{"value":81,"t73":87,"difference":-6}},"pros":[{"point":"More fire than the T73 in CZ","figures":"92 vs 87"},{"point":"A little more face for its weight","figures":"105 vs 100"}],"cons":[{"point":"Heavy, as CZ always is","figures":"3.81 vs 2.31 ct"},{"point":"About three-fifths of the T73's light","figures":"59 vs 98"},{"point":"A less regular pavilion","figures":"64 vs 100"},{"point":"A quarter of the light leaks","figures":"25 vs 1"}]},{"cut":"pear","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/pear","headline":"Pear Cut Cubic Zirconia: faces up larger than a round of the same weight","summary":"A pear in CZ shows more face for its carat weight than a round, and more colour than a diamond pear. Tipped, it keeps less of its light than any other cut we measure in CZ.","scores_line":"Brilliance 59 · Fire 90 · Scintillation 76 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":72,"t73":93,"difference":-21},"brilliance":{"value":59,"t73":98,"difference":-39},"fire":{"value":90,"t73":87,"difference":3},"scintillation":{"value":76,"t73":80,"difference":-4},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":85,"t73":100,"difference":-15},"shape_norm":{"value":69,"t73":106,"difference":-37},"tilt":{"value":64,"t73":87,"difference":-23}},"pros":[{"point":"Faces up larger for its weight","figures":"115 vs 100"},{"point":"More fire than a diamond pear","figures":"90 vs 84"}],"cons":[{"point":"Much heavier than diamond","figures":"2.25 vs 1.37 ct"},{"point":"Much less light than the T73","figures":"59 vs 98"},{"point":"Keeps the least light when tipped of any cut in CZ","figures":"64 vs 87"},{"point":"Nearly a fifth leaks through the back","figures":"19 vs 1"}]},{"cut":"radiant","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/radiant","headline":"Radiant Cut Cubic Zirconia: a large face for its weight, with little light behind it","summary":"Shallow and broad, the radiant in CZ shows a large face for its weight and throws more colour than a diamond radiant. Nearly half its light leaks through the back.","scores_line":"Brilliance 33 · Fire 91 · Scintillation 74 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":68,"t73":93,"difference":-25},"brilliance":{"value":33,"t73":98,"difference":-65},"fire":{"value":91,"t73":87,"difference":4},"scintillation":{"value":74,"t73":80,"difference":-6},"spread":{"value":105,"t73":100,"difference":5},"symmetry":{"value":99,"t73":100,"difference":-1},"shape_norm":{"value":39,"t73":106,"difference":-67},"tilt":{"value":100,"t73":87,"difference":13}},"pros":[{"point":"Faces up much larger for its weight","figures":"118 vs 100"},{"point":"More fire than a diamond radiant","figures":"91 vs 77"}],"cons":[{"point":"A third of the T73's light","figures":"33 vs 98"},{"point":"Heavier than diamond, as always in CZ","figures":"2.57 vs 1.56 ct"},{"point":"Nearly half the light leaks","figures":"47 vs 1"},{"point":"A little less sparkle than the T73","figures":"74 vs 80"}]},{"cut":"rectangle","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/rectangle","headline":"Rectangle Cut Cubic Zirconia: as much face for its weight as any cut we measure","summary":"With straight sides and square corners, the rectangle shows as much face for its weight as any cut we measure. In CZ it out-fires a diamond rectangle, and returns about half the T73's light.","scores_line":"Brilliance 51 · Fire 87 · Scintillation 63 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":69,"t73":93,"difference":-24},"brilliance":{"value":51,"t73":98,"difference":-47},"fire":{"value":87,"t73":87,"difference":0},"scintillation":{"value":63,"t73":80,"difference":-17},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":67,"t73":106,"difference":-39},"tilt":{"value":75,"t73":87,"difference":-12}},"pros":[{"point":"As much face for its weight as any cut we measure","figures":"121 vs 100"},{"point":"More fire than a diamond rectangle","figures":"87 vs 77"}],"cons":[{"point":"Heavier than diamond","figures":"3.46 vs 2.10 ct"},{"point":"About half the T73's light","figures":"51 vs 98"},{"point":"Nearly two-fifths of the light leaks","figures":"39 vs 1"},{"point":"Fewer flashes than a round","figures":"63 vs 80"}]},{"cut":"teardrop","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/teardrop","headline":"Teardrop Cut Cubic Zirconia: more fire than the round, in a softened pear","summary":"Fuller in the shoulder than a pear, the teardrop in CZ out-fires the T73 and faces up larger for its weight. It returns a little over half the round's light.","scores_line":"Brilliance 55 · Fire 95 · Scintillation 81 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":74,"t73":93,"difference":-19},"brilliance":{"value":55,"t73":98,"difference":-43},"fire":{"value":95,"t73":87,"difference":8},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":98,"t73":100,"difference":-2},"shape_norm":{"value":63,"t73":106,"difference":-43},"tilt":{"value":70,"t73":87,"difference":-17}},"pros":[{"point":"Faces up larger for its weight","figures":"116 vs 100"},{"point":"More fire than the T73 in CZ","figures":"95 vs 87"}],"cons":[{"point":"Heavier than diamond","figures":"2.11 vs 1.28 ct"},{"point":"A little over half the T73's light","figures":"55 vs 98"},{"point":"About a quarter of the light leaks","figures":"26 vs 1"},{"point":"Loses light quickly when tipped","figures":"70 vs 87"}]},{"cut":"emerald-square","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/emerald-square","headline":"Emerald Square Cut Cubic Zirconia: more fire and a steadier tilt than the same cut in diamond","summary":"Concentric steps on a square: in CZ the emerald square beats the diamond version on fire and on holding its light as it tips. It returns two-thirds of the T73's light.","scores_line":"Brilliance 65 · Fire 89 · Scintillation 72 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":79,"t73":93,"difference":-14},"brilliance":{"value":65,"t73":98,"difference":-33},"fire":{"value":89,"t73":87,"difference":2},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":108,"t73":100,"difference":8},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":86,"t73":106,"difference":-20},"tilt":{"value":84,"t73":87,"difference":-3}},"pros":[{"point":"More fire than a diamond emerald square","figures":"89 vs 84"},{"point":"Holds its light better than in diamond","figures":"84 vs 79"}],"cons":[{"point":"Heavier than the diamond version","figures":"2.40 vs 1.46 ct"},{"point":"Two-thirds of the T73's light","figures":"65 vs 98"},{"point":"A fifth of the light leaks","figures":"21 vs 1"},{"point":"Slightly fewer flashes","figures":"72 vs 80"}]},{"cut":"radiant-square","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/radiant-square","headline":"Radiant Square Cut Cubic Zirconia: far more fire than in diamond, and steady when tipped","summary":"Cropped corners over a brilliant pavilion. In CZ the radiant square gains a great deal of fire over the diamond version and keeps almost all its light as it tips; it returns three-quarters of the T73's.","scores_line":"Brilliance 74 · Fire 81 · Scintillation 66 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":83,"t73":93,"difference":-10},"brilliance":{"value":74,"t73":98,"difference":-24},"fire":{"value":81,"t73":87,"difference":-6},"scintillation":{"value":66,"t73":80,"difference":-14},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":86,"t73":106,"difference":-20},"tilt":{"value":98,"t73":87,"difference":11}},"pros":[{"point":"Far more fire than a diamond radiant square","figures":"81 vs 62"},{"point":"Keeps nearly all its light when tipped","figures":"98 vs 90"}],"cons":[{"point":"Heavy for its size","figures":"2.67 vs 1.62 ct"},{"point":"A quarter less light than the T73","figures":"74 vs 98"},{"point":"Fewer flashes than the T73","figures":"66 vs 80"},{"point":"Some light leaks","figures":"13 vs 1"}]},{"cut":"triangle","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/triangle","headline":"Triangle Cut Cubic Zirconia: more fire than a diamond triangle","summary":"The fewest facets in our census, 19. In CZ the triangle turns a larger share of its light into colour than both the diamond triangle and the T73, and sparkles less than any other cut we measure in CZ.","scores_line":"Brilliance 54 · Fire 94 · Scintillation 34 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":73,"t73":93,"difference":-20},"brilliance":{"value":54,"t73":98,"difference":-44},"fire":{"value":94,"t73":87,"difference":7},"scintillation":{"value":34,"t73":80,"difference":-46},"spread":{"value":104,"t73":100,"difference":4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":71,"t73":106,"difference":-35},"tilt":{"value":92,"t73":87,"difference":5}},"pros":[{"point":"More fire than the diamond triangle","figures":"94 vs 86"}],"cons":[{"point":"Heavier than diamond","figures":"1.30 vs 0.79 ct"},{"point":"The least sparkle we measure in CZ","figures":"34 vs 80"},{"point":"Little more than half the T73's light","figures":"54 vs 98"},{"point":"More than a quarter of the light leaks","figures":"27 vs 1"}]},{"cut":"hexagon","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/hexagon","headline":"Hexagon Cut Cubic Zirconia: six sides, and less light than a round","summary":"Six sides, a stepped crown and a tiered pavilion. In CZ nothing on the hexagon counts as a pro by our rules, and it returns about two-thirds of the T73's light.","scores_line":"Brilliance 64 · Fire 84 · Scintillation 56 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":78,"t73":93,"difference":-15},"brilliance":{"value":64,"t73":98,"difference":-34},"fire":{"value":84,"t73":87,"difference":-3},"scintillation":{"value":56,"t73":80,"difference":-24},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":84,"t73":106,"difference":-22},"tilt":{"value":100,"t73":87,"difference":13}},"pros":[],"cons":[{"point":"Heavier than a diamond hexagon","figures":"2.12 vs 1.29 ct"},{"point":"About two-thirds of the T73's light","figures":"64 vs 98"},{"point":"Fewer flashes than a round","figures":"56 vs 80"},{"point":"A fifth of its light leaks","figures":"21 vs 1"}]},{"cut":"octagon","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/octagon","headline":"Octagon Cut Cubic Zirconia: an eight-sided cut that trails the round on light","summary":"A stepped crown over a three-tier pavilion, on eight sides. In CZ the octagon returns more than three-quarters of the T73's light, and nothing it does counts as a pro by our rules.","scores_line":"Brilliance 76 · Fire 80 · Scintillation 66 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":82,"t73":93,"difference":-11},"brilliance":{"value":76,"t73":98,"difference":-22},"fire":{"value":80,"t73":87,"difference":-7},"scintillation":{"value":66,"t73":80,"difference":-14},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":100,"t73":106,"difference":-6},"tilt":{"value":97,"t73":87,"difference":10}},"pros":[],"cons":[{"point":"Much heavier than diamond","figures":"2.03 vs 1.23 ct"},{"point":"Less light than the T73","figures":"76 vs 98"},{"point":"Some light leaks through the back","figures":"16 vs 1"},{"point":"Fewer flashes than a round","figures":"66 vs 80"}]},{"cut":"dg-bowtie","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-bowtie","headline":"DG-Bowtie Cubic Zirconia: more fire than in diamond, and more sparkle than the T73","summary":"A marquise 93.8% deep. In CZ it throws more colour than in diamond and sparkles more than the T73, and it returns about a quarter of the round's light.","scores_line":"Brilliance 26 · Fire 90 · Scintillation 86 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":63,"t73":93,"difference":-30},"brilliance":{"value":26,"t73":98,"difference":-72},"fire":{"value":90,"t73":87,"difference":3},"scintillation":{"value":86,"t73":80,"difference":6},"spread":{"value":87,"t73":100,"difference":-13},"symmetry":{"value":94,"t73":100,"difference":-6},"shape_norm":{"value":30,"t73":106,"difference":-76},"tilt":{"value":77,"t73":87,"difference":-10}},"pros":[{"point":"More fire than in diamond","figures":"90 vs 82"},{"point":"More sparkle than the T73","figures":"86 vs 80"}],"cons":[{"point":"About a quarter of the T73's light","figures":"26 vs 98"},{"point":"Very heavy for its width","figures":"5.20 vs 3.16 ct"},{"point":"Two-fifths of the light leaks","figures":"41 vs 1"},{"point":"Loses more light when tipped","figures":"77 vs 87"}]},{"cut":"dg-elongated-hexagon","gemstone":"cubic-zirconia","url":"https://digitalgemology.com/gemstones/cubic-zirconia/dg-elongated-hexagon","headline":"DG-Elongated Hexagon Cubic Zirconia: the most fire we measure here, from very little light","summary":"Finished alike front and back, with a back flat that is a window by design. In CZ it scores the highest fire and the lowest brilliance we measure, and the census counts the light through that window as lost.","scores_line":"Brilliance 16 · Fire 97 · Scintillation 51 · in our census, where the T73 scores 98 · 87 · 80 in cubic zirconia","scores":{"global":{"value":53,"t73":93,"difference":-40},"brilliance":{"value":16,"t73":98,"difference":-82},"fire":{"value":97,"t73":87,"difference":10},"scintillation":{"value":51,"t73":80,"difference":-29},"spread":{"value":111,"t73":100,"difference":11},"symmetry":{"value":73,"t73":100,"difference":-27},"shape_norm":{"value":22,"t73":106,"difference":-84},"tilt":{"value":80,"t73":87,"difference":-7}},"pros":[{"point":"The most fire we measure in CZ","figures":"97 vs 87"},{"point":"A little more face for its weight","figures":"107 vs 100"}],"cons":[{"point":"The least light of any cut we measure in CZ","figures":"16 vs 98"},{"point":"Over two-thirds of the light leaks","figures":"69 vs 1"},{"point":"Heavier than diamond","figures":"2.97 vs 1.80 ct"},{"point":"Fewer flashes than a round","figures":"51 vs 80"}]},{"cut":"baguette","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/baguette","headline":"Baguette Cut Ruby: more fire and more face per carat than a round","summary":"A slim step cut with few facets: in ruby it has more fire than a round, 53 to 37, and a Face-up size of 108, but less Brilliance, Scintillation and Tilt.","scores_line":"Brilliance 53 · Fire 53 · Scintillation 43 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":52,"t73":79,"difference":-27},"brilliance":{"value":53,"t73":94,"difference":-41},"fire":{"value":53,"t73":37,"difference":16},"scintillation":{"value":43,"t73":80,"difference":-37},"spread":{"value":97,"t73":100,"difference":-3},"symmetry":{"value":39,"t73":100,"difference":-61},"shape_norm":{"value":69,"t73":102,"difference":-33},"tilt":{"value":57,"t73":75,"difference":-18}},"pros":[{"point":"More fire than a round ruby","figures":"53 vs 37"},{"point":"More face for its weight","figures":"108 vs 100"}],"cons":[{"point":"The least regular pavilion we measure in ruby","figures":"39 vs 100"},{"point":"Gives up light when tipped, unlike the diamond baguette","figures":"57 vs 100"},{"point":"Much less light than a round ruby","figures":"53 vs 94"},{"point":"Fewer flashes than a round","figures":"43 vs 80"}]},{"cut":"emerald-cut","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/emerald-cut","headline":"Emerald Cut Ruby: a little more face per carat than a round","summary":"Long steps and cropped corners: in ruby the emerald cut covers slightly more area per carat than a round, and returns a good deal less light.","scores_line":"Brilliance 65 · Fire 47 · Scintillation 72 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":61,"t73":79,"difference":-18},"brilliance":{"value":65,"t73":94,"difference":-29},"fire":{"value":47,"t73":37,"difference":10},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":64,"t73":100,"difference":-36},"shape_norm":{"value":85,"t73":102,"difference":-17},"tilt":{"value":55,"t73":75,"difference":-20}},"pros":[{"point":"Slightly larger face for its weight","figures":"105 vs 100"}],"cons":[{"point":"Far less fire than a diamond emerald cut","figures":"47 vs 87"},{"point":"A less even pavilion than a round","figures":"64 vs 100"},{"point":"Much less light than a round ruby","figures":"65 vs 94"},{"point":"Gives up more light when tipped than in diamond","figures":"55 vs 83"}]},{"cut":"radiant","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/radiant","headline":"Radiant Cut Ruby: far more fire than a round, and a larger face per carat","summary":"A brilliant pavilion under a cropped rectangle: in ruby the radiant scores Fire 69 and a Face-up size of 118, but 67% of its light leaves through the back.","scores_line":"Brilliance 26 · Fire 69 · Scintillation 74 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":59,"t73":79,"difference":-20},"brilliance":{"value":26,"t73":94,"difference":-68},"fire":{"value":69,"t73":37,"difference":32},"scintillation":{"value":74,"t73":80,"difference":-6},"spread":{"value":105,"t73":100,"difference":5},"symmetry":{"value":99,"t73":100,"difference":-1},"shape_norm":{"value":31,"t73":102,"difference":-71},"tilt":{"value":100,"t73":75,"difference":25}},"pros":[{"point":"Far more fire than a round ruby","figures":"69 vs 37"},{"point":"A larger face for its weight","figures":"118 vs 100"}],"cons":[{"point":"The second-dimmest cut we measure in ruby","figures":"26 vs 94"},{"point":"Most of the light leaks","figures":"67 vs 5"},{"point":"Heavier than a diamond radiant","figures":"1.78 vs 1.56 ct"},{"point":"Slightly fewer flashes than a round","figures":"74 vs 80"}]},{"cut":"rectangle","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/rectangle","headline":"Rectangle Cut Ruby: as much face per carat as any cut we measure","summary":"Square corners and wide steps: in ruby the rectangle shows as much face for its weight as any cut we measure, level with the marquise, and loses about half its light through the back.","scores_line":"Brilliance 41 · Fire 58 · Scintillation 63 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":60,"t73":79,"difference":-19},"brilliance":{"value":41,"t73":94,"difference":-53},"fire":{"value":58,"t73":37,"difference":21},"scintillation":{"value":63,"t73":80,"difference":-17},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":55,"t73":102,"difference":-47},"tilt":{"value":81,"t73":75,"difference":6}},"pros":[{"point":"More fire than a round ruby","figures":"58 vs 37"},{"point":"The most face per carat in ruby, with the marquise","figures":"121 vs 100"}],"cons":[{"point":"Under half the light of a round ruby","figures":"41 vs 94"},{"point":"About half the light leaks","figures":"52 vs 5"},{"point":"Fewer flashes than a round","figures":"63 vs 80"},{"point":"Heavier than a diamond rectangle","figures":"2.39 vs 2.10 ct"}]},{"cut":"asscher","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/asscher","headline":"Asscher Cut Ruby: holds its light when tipped, better than in diamond","summary":"Concentric square steps and deep-cropped corners: in ruby the Asscher keeps its light steady as it tips, from a face that starts with less than a round's.","scores_line":"Brilliance 68 · Fire 53 · Scintillation 72 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":72,"t73":79,"difference":-7},"brilliance":{"value":68,"t73":94,"difference":-26},"fire":{"value":53,"t73":37,"difference":16},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":107,"t73":100,"difference":7},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":89,"t73":102,"difference":-13},"tilt":{"value":85,"t73":75,"difference":10}},"pros":[{"point":"Holds its light better than a diamond Asscher","figures":"85 vs 79"}],"cons":[{"point":"Much less fire than a diamond Asscher","figures":"53 vs 80"},{"point":"Less light than a round ruby","figures":"68 vs 94"},{"point":"More light leaks than through a round","figures":"29 vs 5"},{"point":"Heavier than a diamond Asscher","figures":"1.53 vs 1.34 ct"}]},{"cut":"radiant-square","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/radiant-square","headline":"Radiant Square Cut Ruby: a steady square brilliant with modest light and little fire","summary":"A square radiant in ruby holds its light well when tipped, but it starts with less than a round and scores Fire 25 to the diamond version's 62.","scores_line":"Brilliance 76 · Fire 25 · Scintillation 66 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":69,"t73":79,"difference":-10},"brilliance":{"value":76,"t73":94,"difference":-18},"fire":{"value":25,"t73":37,"difference":-12},"scintillation":{"value":66,"t73":80,"difference":-14},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":88,"t73":102,"difference":-14},"tilt":{"value":85,"t73":75,"difference":10}},"pros":[],"cons":[{"point":"Much less fire than a diamond square radiant","figures":"25 vs 62"},{"point":"Less light than a round ruby","figures":"76 vs 94"},{"point":"A fifth of the light leaks","figures":"20 vs 5"},{"point":"Fewer flashes than a round","figures":"66 vs 80"}]},{"cut":"triangle","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/triangle","headline":"Triangle Cut Ruby: a plain three-sided cut that returns little light","summary":"19 facets on a three-sided outline: in ruby one of the dimmest results we measure, Brilliance 33 to the T73's 94.","scores_line":"Brilliance 33 · Fire 54 · Scintillation 34 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":57,"t73":79,"difference":-22},"brilliance":{"value":33,"t73":94,"difference":-61},"fire":{"value":54,"t73":37,"difference":17},"scintillation":{"value":34,"t73":80,"difference":-46},"spread":{"value":104,"t73":100,"difference":4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":43,"t73":102,"difference":-59},"tilt":{"value":100,"t73":75,"difference":25}},"pros":[],"cons":[{"point":"About a third of a round's light","figures":"33 vs 94"},{"point":"The fewest flashes of any ruby cut","figures":"34 vs 80"},{"point":"Over two-fifths of the light leaks","figures":"42 vs 5"},{"point":"Less fire than a diamond triangle","figures":"54 vs 86"}]},{"cut":"hexagon","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/hexagon","headline":"Hexagon Cut Ruby: six-sided geometry with modest light","summary":"A six-sided cut with a stepped crown: in ruby it holds its light when tipped, but returns about a third less light than a round.","scores_line":"Brilliance 64 · Fire 45 · Scintillation 56 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":70,"t73":79,"difference":-9},"brilliance":{"value":64,"t73":94,"difference":-30},"fire":{"value":45,"t73":37,"difference":8},"scintillation":{"value":56,"t73":80,"difference":-24},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":85,"t73":102,"difference":-17},"tilt":{"value":98,"t73":75,"difference":23}},"pros":[],"cons":[{"point":"Barely half the fire of a diamond hexagon","figures":"45 vs 85"},{"point":"About a third less light than a round ruby","figures":"64 vs 94"},{"point":"Fewer flashes than a round","figures":"56 vs 80"},{"point":"About a quarter of the light leaks","figures":"24 vs 5"}]},{"cut":"octagon","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/octagon","headline":"Octagon Cut Ruby: an even eight-sided face that keeps its light steady","summary":"Eight even sides and a stepped crown: in ruby the octagon returns more light than the diamond octagon, and much less fire.","scores_line":"Brilliance 78 · Fire 33 · Scintillation 66 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":72,"t73":79,"difference":-7},"brilliance":{"value":78,"t73":94,"difference":-16},"fire":{"value":33,"t73":37,"difference":-4},"scintillation":{"value":66,"t73":80,"difference":-14},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":103,"t73":102,"difference":1},"tilt":{"value":87,"t73":75,"difference":12}},"pros":[],"cons":[{"point":"Under half the fire of a diamond octagon","figures":"33 vs 76"},{"point":"Less light than a round ruby","figures":"78 vs 94"},{"point":"A fifth of the light leaks","figures":"20 vs 5"},{"point":"Fewer flashes than a round","figures":"66 vs 80"}]},{"cut":"portuguese-birds-nest","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/portuguese-birds-nest","headline":"Portuguese Bird's Nest Cut Ruby: as much scintillation as any cut we measure","summary":"177 facets in interlocking tiers: in ruby the Portuguese cut sparkles as finely as anything we measure, and gives up most of the fire the diamond version shows.","scores_line":"Brilliance 69 · Fire 16 · Scintillation 98 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":69,"t73":79,"difference":-10},"brilliance":{"value":69,"t73":94,"difference":-25},"fire":{"value":16,"t73":37,"difference":-21},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":75,"t73":102,"difference":-27},"tilt":{"value":100,"t73":75,"difference":25}},"pros":[{"point":"As much sparkle as any cut we measure in ruby","figures":"98 vs 80"}],"cons":[{"point":"About a quarter of the diamond version's fire","figures":"16 vs 65"},{"point":"Less light than a round ruby","figures":"69 vs 94"},{"point":"Almost a third of the light escapes","figures":"30 vs 5"},{"point":"Heavier than a diamond of the same size","figures":"1.27 vs 1.11 ct"}]},{"cut":"mazarin","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/mazarin","headline":"Mazarin Cut Ruby: more light than the Peruzzi or the Old Mine, and well short of a round","summary":"A cushion of 42 facets: in ruby it returns 58 for brilliance to a modern round's 94, and loses 37% of its light through the back.","scores_line":"Brilliance 58 · Fire 40 · Scintillation 61 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":66,"t73":79,"difference":-13},"brilliance":{"value":58,"t73":94,"difference":-36},"fire":{"value":40,"t73":37,"difference":3},"scintillation":{"value":61,"t73":80,"difference":-19},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":63,"t73":102,"difference":-39},"tilt":{"value":100,"t73":75,"difference":25}},"pros":[],"cons":[{"point":"Much less light than a round ruby","figures":"58 vs 94"},{"point":"Over a third of the light leaks","figures":"37 vs 5"},{"point":"Less fire than a diamond Mazarin","figures":"40 vs 63"},{"point":"Fewer flashes than a round","figures":"61 vs 80"}]},{"cut":"peruzzi","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/peruzzi","headline":"Peruzzi Cut Ruby: a round's sparkle on a cushion outline, and half the light lost","summary":"A historic cushion: in ruby it sparkles as much as a modern round and loses about half its light through the back.","scores_line":"Brilliance 46 · Fire 22 · Scintillation 81 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":57,"t73":79,"difference":-22},"brilliance":{"value":46,"t73":94,"difference":-48},"fire":{"value":22,"t73":37,"difference":-15},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":85,"t73":100,"difference":-15},"shape_norm":{"value":72,"t73":102,"difference":-30},"tilt":{"value":100,"t73":75,"difference":25}},"pros":[],"cons":[{"point":"About half the light of a round ruby","figures":"46 vs 94"},{"point":"Over half the light leaks","figures":"52 vs 5"},{"point":"Far less fire than a diamond Peruzzi","figures":"22 vs 68"},{"point":"A less regular pavilion","figures":"85 vs 100"}]},{"cut":"old-mine","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/old-mine","headline":"Old Mine Cut Ruby: a modern round's sparkle, with half the light lost","summary":"A historic cushion, in ruby: Scintillation 81 to the T73's 80, 14% heavier than the same cut in diamond, and 49% of the light lost through the pavilion.","scores_line":"Brilliance 50 · Fire 36 · Scintillation 81 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":62,"t73":79,"difference":-17},"brilliance":{"value":50,"t73":94,"difference":-44},"fire":{"value":36,"t73":37,"difference":-1},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":90,"t73":100,"difference":-10},"shape_norm":{"value":78,"t73":102,"difference":-24},"tilt":{"value":100,"t73":75,"difference":25}},"pros":[],"cons":[{"point":"About half a round's light","figures":"50 vs 94"},{"point":"Nearly half the light leaks","figures":"49 vs 5"},{"point":"Half the fire of a diamond Old Mine","figures":"36 vs 72"},{"point":"Heavier than a diamond Old Mine","figures":"1.37 vs 1.21 ct"}]},{"cut":"dg-bowtie","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/dg-bowtie","headline":"DG-Bowtie Ruby: a little more sparkle than a round, and very little light","summary":"Cut almost as deep as it is wide, 93.8%: in ruby DG-Bowtie sparkles a little more than a round and returns less light than any other cut we measure.","scores_line":"Brilliance 18 · Fire 57 · Scintillation 86 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":55,"t73":79,"difference":-24},"brilliance":{"value":18,"t73":94,"difference":-76},"fire":{"value":57,"t73":37,"difference":20},"scintillation":{"value":86,"t73":80,"difference":6},"spread":{"value":87,"t73":100,"difference":-13},"symmetry":{"value":94,"t73":100,"difference":-6},"shape_norm":{"value":21,"t73":102,"difference":-81},"tilt":{"value":92,"t73":75,"difference":17}},"pros":[{"point":"A little more sparkle than a round","figures":"86 vs 80"}],"cons":[{"point":"The least light of any cut we measure in ruby","figures":"18 vs 94"},{"point":"More than half the light leaks","figures":"55 vs 5"},{"point":"Less fire than in diamond","figures":"57 vs 82"},{"point":"Heavy for its face","figures":"3.59 vs 3.16 ct"}]},{"cut":"dg-elongated-hexagon","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/dg-elongated-hexagon","headline":"DG-Elongated Hexagon Ruby: nearly twice a round's fire, on a two-sided step cut","summary":"A two-sided step cut: in ruby its Fire, 72, is second only to the oval's 74, and 64% of its light leaves through the back.","scores_line":"Brilliance 27 · Fire 72 · Scintillation 51 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":48,"t73":79,"difference":-31},"brilliance":{"value":27,"t73":94,"difference":-67},"fire":{"value":72,"t73":37,"difference":35},"scintillation":{"value":51,"t73":80,"difference":-29},"spread":{"value":111,"t73":100,"difference":11},"symmetry":{"value":73,"t73":100,"difference":-27},"shape_norm":{"value":35,"t73":102,"difference":-67},"tilt":{"value":56,"t73":75,"difference":-19}},"pros":[{"point":"Nearly twice the fire of a round ruby","figures":"72 vs 37"},{"point":"A little more face for its weight","figures":"107 vs 100"}],"cons":[{"point":"Under a third of a round's light, window included","figures":"27 vs 94"},{"point":"Nearly two-thirds of the light leaks","figures":"64 vs 5"},{"point":"Loses light as it tips, where the diamond does not","figures":"56 vs 100"},{"point":"Fewer flashes than a round","figures":"51 vs 80"}]},{"cut":"dg-octagonal-kite","gemstone":"ruby","url":"https://digitalgemology.com/gemstones/ruby/dg-octagonal-kite","headline":"DG-Octagonal Kite Ruby: an even eight-fold face, with less light and fire than in diamond","summary":"Bright in diamond, DG-Octagonal Kite gives up some light and most of its fire in ruby.","scores_line":"Brilliance 74 · Fire 34 · Scintillation 60 · in our census, where the T73 scores 94 · 37 · 80 in ruby","scores":{"global":{"value":71,"t73":79,"difference":-8},"brilliance":{"value":74,"t73":94,"difference":-20},"fire":{"value":34,"t73":37,"difference":-3},"scintillation":{"value":60,"t73":80,"difference":-20},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":85,"t73":102,"difference":-17},"tilt":{"value":95,"t73":75,"difference":20}},"pros":[],"cons":[{"point":"Well under half the diamond version's fire","figures":"34 vs 82"},{"point":"A quarter of the light leaks","figures":"26 vs 5"},{"point":"About a fifth less light than a round ruby","figures":"74 vs 94"},{"point":"Fewer flashes than a round","figures":"60 vs 80"}]},{"cut":"baguette","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/baguette","headline":"Baguette Cut Sapphire: more fire than a round, and a larger face for its weight","summary":"A slim step cut of 21 facets: in sapphire it out-fires the round and shows more face for its weight, and gives up much of the round's light and sparkle.","scores_line":"Brilliance 53 · Fire 53 · Scintillation 43 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":52,"t73":79,"difference":-27},"brilliance":{"value":53,"t73":94,"difference":-41},"fire":{"value":53,"t73":37,"difference":16},"scintillation":{"value":43,"t73":80,"difference":-37},"spread":{"value":97,"t73":100,"difference":-3},"symmetry":{"value":39,"t73":100,"difference":-61},"shape_norm":{"value":69,"t73":102,"difference":-33},"tilt":{"value":57,"t73":75,"difference":-18}},"pros":[{"point":"More fire than the T73 in sapphire","figures":"53 vs 37"},{"point":"Faces up larger than a round of its weight","figures":"108 vs 100"}],"cons":[{"point":"The least regular pavilion we measure in sapphire","figures":"39 vs 100"},{"point":"Loses more of its light when tipped than in diamond","figures":"57 vs 100"},{"point":"Just over half the round's light","figures":"53 vs 94"},{"point":"Far fewer flashes than a round","figures":"43 vs 80"}]},{"cut":"emerald-cut","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/emerald-cut","headline":"Emerald Cut Sapphire: a long step cut that faces up a little larger for its weight","summary":"Broad steps on a long outline: in sapphire the emerald cut shows a little more face than a round of its weight, and returns a little over two-thirds of the round's light.","scores_line":"Brilliance 65 · Fire 47 · Scintillation 72 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":61,"t73":79,"difference":-18},"brilliance":{"value":65,"t73":94,"difference":-29},"fire":{"value":47,"t73":37,"difference":10},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":64,"t73":100,"difference":-36},"shape_norm":{"value":85,"t73":102,"difference":-17},"tilt":{"value":55,"t73":75,"difference":-20}},"pros":[{"point":"Faces up a little larger for its weight","figures":"105 vs 100"}],"cons":[{"point":"Far less fire than the diamond emerald cut","figures":"47 vs 87"},{"point":"A less regular pavilion than a round","figures":"64 vs 100"},{"point":"About a third less light than the T73","figures":"65 vs 94"},{"point":"Darkens faster than the diamond version when tipped","figures":"55 vs 83"}]},{"cut":"radiant","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/radiant","headline":"Radiant Cut Sapphire: almost twice the round's fire, and a larger face for its weight","summary":"Cropped corners over a brilliant pavilion: in sapphire the radiant throws fire and faces up large, and lets more light out of its back than any other cut we measure in this stone.","scores_line":"Brilliance 26 · Fire 69 · Scintillation 74 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":59,"t73":79,"difference":-20},"brilliance":{"value":26,"t73":94,"difference":-68},"fire":{"value":69,"t73":37,"difference":32},"scintillation":{"value":74,"t73":80,"difference":-6},"spread":{"value":105,"t73":100,"difference":5},"symmetry":{"value":99,"t73":100,"difference":-1},"shape_norm":{"value":31,"t73":102,"difference":-71},"tilt":{"value":100,"t73":75,"difference":25}},"pros":[{"point":"Nearly twice the T73's fire","figures":"69 vs 37"},{"point":"Faces up larger for its weight","figures":"118 vs 100"}],"cons":[{"point":"Under a third of the T73's light","figures":"26 vs 94"},{"point":"Two-thirds of the light leaks","figures":"67 vs 5"},{"point":"Heavier than a diamond radiant of the same width","figures":"1.78 vs 1.56 ct"},{"point":"A little less sparkle than the round","figures":"74 vs 80"}]},{"cut":"rectangle","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/rectangle","headline":"Rectangle Cut Sapphire: the joint-largest face for its weight we measure","summary":"A plain step-cut rectangle with square corners: per carat it shows as much face as any cut we measure, and lets just over half its light out through the back.","scores_line":"Brilliance 41 · Fire 58 · Scintillation 63 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":60,"t73":79,"difference":-19},"brilliance":{"value":41,"t73":94,"difference":-53},"fire":{"value":58,"t73":37,"difference":21},"scintillation":{"value":63,"t73":80,"difference":-17},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":55,"t73":102,"difference":-47},"tilt":{"value":81,"t73":75,"difference":6}},"pros":[{"point":"More fire than the round","figures":"58 vs 37"},{"point":"The largest face for its weight, with the marquise","figures":"121 vs 100"}],"cons":[{"point":"Under half the T73's light","figures":"41 vs 94"},{"point":"Just over half the light leaks","figures":"52 vs 5"},{"point":"Fewer flashes than a round","figures":"63 vs 80"},{"point":"Heavier than diamond at the same width","figures":"2.39 vs 2.10 ct"}]},{"cut":"asscher","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/asscher","headline":"Asscher Cut Sapphire: holds its light at a tilt better than the diamond version","summary":"A square step cut with deep corners: in sapphire it holds its light better than a diamond Asscher when tipped, with about as much light face-up and far less fire.","scores_line":"Brilliance 68 · Fire 53 · Scintillation 72 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":72,"t73":79,"difference":-7},"brilliance":{"value":68,"t73":94,"difference":-26},"fire":{"value":53,"t73":37,"difference":16},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":107,"t73":100,"difference":7},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":89,"t73":102,"difference":-13},"tilt":{"value":85,"t73":75,"difference":10}},"pros":[{"point":"Holds its light better than a diamond Asscher when tipped","figures":"85 vs 79"}],"cons":[{"point":"Less fire than the diamond Asscher","figures":"53 vs 80"},{"point":"Over a quarter less light than the T73","figures":"68 vs 94"},{"point":"Nearly three in ten rays leak","figures":"29 vs 5"},{"point":"Heavier than a diamond Asscher","figures":"1.53 vs 1.34 ct"}]},{"cut":"radiant-square","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/radiant-square","headline":"Radiant Square Cut Sapphire: a cropped-corner square with less light and fire than a round","summary":"A square radiant in sapphire keeps a fair share of a round's light and very little of a diamond's fire. By our margins, nothing it does counts as a pro.","scores_line":"Brilliance 76 · Fire 25 · Scintillation 66 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":69,"t73":79,"difference":-10},"brilliance":{"value":76,"t73":94,"difference":-18},"fire":{"value":25,"t73":37,"difference":-12},"scintillation":{"value":66,"t73":80,"difference":-14},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":88,"t73":102,"difference":-14},"tilt":{"value":85,"t73":75,"difference":10}},"pros":[],"cons":[{"point":"Far less fire than the diamond radiant square","figures":"25 vs 62"},{"point":"About a fifth less light than the T73","figures":"76 vs 94"},{"point":"Four times the T73's leakage","figures":"20 vs 5"},{"point":"Fewer flashes than the round","figures":"66 vs 80"}]},{"cut":"triangle","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/triangle","headline":"Triangle Cut Sapphire: a simple three-sided design that returns little light","summary":"A plain triangle of 19 facets: in sapphire it trails the round on light, sparkle and leakage, and the diamond triangle on fire.","scores_line":"Brilliance 33 · Fire 54 · Scintillation 34 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":57,"t73":79,"difference":-22},"brilliance":{"value":33,"t73":94,"difference":-61},"fire":{"value":54,"t73":37,"difference":17},"scintillation":{"value":34,"t73":80,"difference":-46},"spread":{"value":104,"t73":100,"difference":4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":43,"t73":102,"difference":-59},"tilt":{"value":100,"t73":75,"difference":25}},"pros":[],"cons":[{"point":"About a third of the T73's light","figures":"33 vs 94"},{"point":"The fewest flashes we measure in sapphire","figures":"34 vs 80"},{"point":"Over two-fifths of the light leaks","figures":"42 vs 5"},{"point":"Far less fire than the diamond triangle","figures":"54 vs 86"}]},{"cut":"hexagon","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/hexagon","headline":"Hexagon Cut Sapphire: a six-sided outline with steady light and far less fire than in diamond","summary":"Six straight sides and a stepped crown: in sapphire the hexagon keeps its light steady when tipped, but it has less of that light than a round, and far less fire than a diamond hexagon.","scores_line":"Brilliance 64 · Fire 45 · Scintillation 56 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":70,"t73":79,"difference":-9},"brilliance":{"value":64,"t73":94,"difference":-30},"fire":{"value":45,"t73":37,"difference":8},"scintillation":{"value":56,"t73":80,"difference":-24},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":85,"t73":102,"difference":-17},"tilt":{"value":98,"t73":75,"difference":23}},"pros":[],"cons":[{"point":"Far less fire than the diamond hexagon","figures":"45 vs 85"},{"point":"About a third less light than the T73","figures":"64 vs 94"},{"point":"Fewer flashes than a round","figures":"56 vs 80"},{"point":"Nearly five times the T73's leakage","figures":"24 vs 5"}]},{"cut":"octagon","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/octagon","headline":"Octagon Cut Sapphire: more light than the diamond octagon, and little fire","summary":"Eight sides over a three-tier pavilion: in sapphire the octagon returns more light than it does in diamond, and keeps far less of the diamond's fire.","scores_line":"Brilliance 78 · Fire 33 · Scintillation 66 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":72,"t73":79,"difference":-7},"brilliance":{"value":78,"t73":94,"difference":-16},"fire":{"value":33,"t73":37,"difference":-4},"scintillation":{"value":66,"t73":80,"difference":-14},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":103,"t73":102,"difference":1},"tilt":{"value":87,"t73":75,"difference":12}},"pros":[],"cons":[{"point":"Far less fire than the diamond octagon","figures":"33 vs 76"},{"point":"Short of the T73's light by about a sixth","figures":"78 vs 94"},{"point":"A fifth of the light leaks","figures":"20 vs 5"},{"point":"Fewer flashes than a round","figures":"66 vs 80"}]},{"cut":"portuguese-birds-nest","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/portuguese-birds-nest","headline":"Portuguese Bird's Nest Cut Sapphire: sparkle level with the best we measure in this stone","summary":"177 facets in interlocking rings: in sapphire it sparkles as much as any cut we measure, and keeps very little fire.","scores_line":"Brilliance 69 · Fire 16 · Scintillation 98 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":69,"t73":79,"difference":-10},"brilliance":{"value":69,"t73":94,"difference":-25},"fire":{"value":16,"t73":37,"difference":-21},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":75,"t73":102,"difference":-27},"tilt":{"value":100,"t73":75,"difference":25}},"pros":[{"point":"As much sparkle as any cut we measure in sapphire","figures":"98 vs 80"}],"cons":[{"point":"Little fire, far below the diamond version","figures":"16 vs 65"},{"point":"Over a quarter less light than the T73","figures":"69 vs 94"},{"point":"Six times the T73's leakage","figures":"30 vs 5"},{"point":"Heavier than diamond for its width","figures":"1.27 vs 1.11 ct"}]},{"cut":"dg-bowtie","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/dg-bowtie","headline":"DG-Bowtie Sapphire: a little more sparkle than a round, in a very deep marquise","summary":"A very deep marquise: in sapphire it sparkles a little more than a round and returns less light than any other cut we measure.","scores_line":"Brilliance 18 · Fire 57 · Scintillation 86 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":55,"t73":79,"difference":-24},"brilliance":{"value":18,"t73":94,"difference":-76},"fire":{"value":57,"t73":37,"difference":20},"scintillation":{"value":86,"t73":80,"difference":6},"spread":{"value":87,"t73":100,"difference":-13},"symmetry":{"value":94,"t73":100,"difference":-6},"shape_norm":{"value":21,"t73":102,"difference":-81},"tilt":{"value":92,"t73":75,"difference":17}},"pros":[{"point":"A little more sparkle than the T73","figures":"86 vs 80"}],"cons":[{"point":"The least light of any cut we measure in sapphire","figures":"18 vs 94"},{"point":"Over half the light leaks","figures":"55 vs 5"},{"point":"Less fire than in diamond","figures":"57 vs 82"},{"point":"Heavier than diamond for its width","figures":"3.59 vs 3.16 ct"}]},{"cut":"dg-elongated-hexagon","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/dg-elongated-hexagon","headline":"DG-Elongated Hexagon Sapphire: the second-highest fire we measure in this stone","summary":"Step cut the same on both faces, with a window behind the table by design: in sapphire it shows strong fire and loses much of its light.","scores_line":"Brilliance 27 · Fire 72 · Scintillation 51 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":48,"t73":79,"difference":-31},"brilliance":{"value":27,"t73":94,"difference":-67},"fire":{"value":72,"t73":37,"difference":35},"scintillation":{"value":51,"t73":80,"difference":-29},"spread":{"value":111,"t73":100,"difference":11},"symmetry":{"value":73,"t73":100,"difference":-27},"shape_norm":{"value":35,"t73":102,"difference":-67},"tilt":{"value":56,"t73":75,"difference":-19}},"pros":[{"point":"Nearly twice the T73's fire","figures":"72 vs 37"},{"point":"Faces up larger for its weight","figures":"107 vs 100"}],"cons":[{"point":"Under a third of the T73's light","figures":"27 vs 94"},{"point":"Nearly two-thirds of the light leaks","figures":"64 vs 5"},{"point":"Holds less light at a tilt than in diamond","figures":"56 vs 100"},{"point":"Fewer flashes than a round","figures":"51 vs 80"}]},{"cut":"dg-octagonal-kite","gemstone":"sapphire","url":"https://digitalgemology.com/gemstones/sapphire/dg-octagonal-kite","headline":"DG-Octagonal Kite Sapphire: steady light at a tilt, with less light and fire than a round","summary":"Eight kites around a large table: in sapphire this house cut trails the round on light and the diamond version on fire, and holds steady when tipped.","scores_line":"Brilliance 74 · Fire 34 · Scintillation 60 · in our census, where the T73 scores 94 · 37 · 80 in sapphire","scores":{"global":{"value":71,"t73":79,"difference":-8},"brilliance":{"value":74,"t73":94,"difference":-20},"fire":{"value":34,"t73":37,"difference":-3},"scintillation":{"value":60,"t73":80,"difference":-20},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":85,"t73":102,"difference":-17},"tilt":{"value":95,"t73":75,"difference":20}},"pros":[],"cons":[{"point":"Far less fire than the diamond version","figures":"34 vs 82"},{"point":"Over five times the T73's leakage","figures":"26 vs 5"},{"point":"About a fifth less light than the T73","figures":"74 vs 94"},{"point":"Fewer flashes than a round","figures":"60 vs 80"}]},{"cut":"baguette","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/baguette","headline":"Baguette Cut Emerald: more fire than a round, and more face for its weight","summary":"21 facets in long, straight steps. In emerald the baguette out-fires the round and shows more face for its weight; for light it scores 42 to the T73's 78.","scores_line":"Brilliance 42 · Fire 58 · Scintillation 43 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":49,"t73":73,"difference":-24},"brilliance":{"value":42,"t73":78,"difference":-36},"fire":{"value":58,"t73":39,"difference":19},"scintillation":{"value":43,"t73":80,"difference":-37},"spread":{"value":97,"t73":100,"difference":-3},"symmetry":{"value":39,"t73":100,"difference":-61},"shape_norm":{"value":55,"t73":84,"difference":-29},"tilt":{"value":60,"t73":77,"difference":-17}},"pros":[{"point":"Lighter than a diamond baguette","figures":"2.81 vs 3.64 ct"},{"point":"More fire than a round emerald","figures":"58 vs 39"},{"point":"A larger face for its weight than a round","figures":"108 vs 100"}],"cons":[{"point":"The least regular pavilion we measure in emerald","figures":"39 vs 100"},{"point":"Loses light when tipped, where the diamond baguette does not","figures":"60 vs 100"},{"point":"Few, long flashes","figures":"43 vs 80"},{"point":"Much less light than a round","figures":"42 vs 78"}]},{"cut":"emerald-cut","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/emerald-cut","headline":"Emerald Cut Emerald: a little more face for its weight than the T73, on a long step-cut outline","summary":"A long step cut with cropped corners. In our census it faces up a little larger than the T73 for its weight but returns less light, and no other cut we measure in emerald keeps a smaller share of its light when tipped.","scores_line":"Brilliance 58 · Fire 36 · Scintillation 72 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":56,"t73":73,"difference":-17},"brilliance":{"value":58,"t73":78,"difference":-20},"fire":{"value":36,"t73":39,"difference":-3},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":64,"t73":100,"difference":-36},"shape_norm":{"value":77,"t73":84,"difference":-7},"tilt":{"value":52,"t73":77,"difference":-25}},"pros":[{"point":"Lighter than a diamond of the same size","figures":"1.79 vs 2.31 ct"},{"point":"Slightly more face for its weight than a round","figures":"105 vs 100"}],"cons":[{"point":"Far less fire than the diamond emerald cut","figures":"36 vs 87"},{"point":"A less regular pavilion than a round","figures":"64 vs 100"},{"point":"The least steady cut we measure in emerald","figures":"52 vs 83"},{"point":"Less light than the T73","figures":"58 vs 78"}]},{"cut":"radiant","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/radiant","headline":"Radiant Cut Emerald: a large face for its weight, on a long, shallow stone","summary":"A cropped rectangle with a brilliant plan beneath. In emerald it shows a large face for its weight, and lets 75% of its light out through the back.","scores_line":"Brilliance 22 · Fire 56 · Scintillation 74 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":54,"t73":73,"difference":-19},"brilliance":{"value":22,"t73":78,"difference":-56},"fire":{"value":56,"t73":39,"difference":17},"scintillation":{"value":74,"t73":80,"difference":-6},"spread":{"value":105,"t73":100,"difference":5},"symmetry":{"value":99,"t73":100,"difference":-1},"shape_norm":{"value":25,"t73":84,"difference":-59},"tilt":{"value":100,"t73":77,"difference":23}},"pros":[{"point":"Lighter than a diamond radiant","figures":"1.21 vs 1.56 ct"},{"point":"A much larger face for its weight than a round","figures":"118 vs 100"}],"cons":[{"point":"A small share of the T73's light","figures":"22 vs 78"},{"point":"As leaky as any cut we measure in emerald","figures":"75 vs 22"},{"point":"Less fire than the diamond radiant","figures":"56 vs 77"},{"point":"Slightly less sparkle than a round","figures":"74 vs 80"}]},{"cut":"rectangle","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/rectangle","headline":"Rectangle Cut Emerald: as much face for its weight as any cut we measure","summary":"Wide steps and square corners. In emerald the rectangle shows as much face per carat as any cut we measure, and loses 68% of its light through the back.","scores_line":"Brilliance 29 · Fire 55 · Scintillation 63 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":56,"t73":73,"difference":-17},"brilliance":{"value":29,"t73":78,"difference":-49},"fire":{"value":55,"t73":39,"difference":16},"scintillation":{"value":63,"t73":80,"difference":-17},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":38,"t73":84,"difference":-46},"tilt":{"value":100,"t73":77,"difference":23}},"pros":[{"point":"Lighter than the diamond rectangle","figures":"1.62 vs 2.10 ct"},{"point":"The most face for its weight we measure, level with the marquise","figures":"121 vs 100"}],"cons":[{"point":"Far less light than a round","figures":"29 vs 78"},{"point":"Most of the light leaks","figures":"68 vs 22"},{"point":"Less fire than the diamond rectangle","figures":"55 vs 77"},{"point":"Fewer flashes than a round","figures":"63 vs 80"}]},{"cut":"princess","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/princess","headline":"Princess Cut Emerald: a sharp-cornered square, lighter in weight than the same cut in diamond","summary":"A square brilliant with sharp corners and chevron pavilion facets. In emerald it trails the round on light and its diamond version on fire, leakage and tilt, and our square brilliant does better on all four.","scores_line":"Brilliance 51 · Fire 32 · Scintillation 78 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":59,"t73":73,"difference":-14},"brilliance":{"value":51,"t73":78,"difference":-27},"fire":{"value":32,"t73":39,"difference":-7},"scintillation":{"value":78,"t73":80,"difference":-2},"spread":{"value":95,"t73":100,"difference":-5},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":79,"t73":84,"difference":-5},"tilt":{"value":77,"t73":77,"difference":0}},"pros":[{"point":"Lighter than a diamond princess","figures":"1.14 vs 1.48 ct"}],"cons":[{"point":"Far less fire than the diamond princess","figures":"32 vs 83"},{"point":"Less light than a round","figures":"51 vs 78"},{"point":"More than twice the diamond version's leakage","figures":"45 vs 18"},{"point":"Less steady when tipped than in diamond","figures":"77 vs 89"}]},{"cut":"radiant-square","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/radiant-square","headline":"Radiant Square Cut Emerald: cropped corners, and lighter in weight than the diamond version","summary":"A square with cropped corners and a brilliant plan beneath. In emerald it holds more light than the princess, and loses most of the diamond version's fire.","scores_line":"Brilliance 57 · Fire 20 · Scintillation 66 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":60,"t73":73,"difference":-13},"brilliance":{"value":57,"t73":78,"difference":-21},"fire":{"value":20,"t73":39,"difference":-19},"scintillation":{"value":66,"t73":80,"difference":-14},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":66,"t73":84,"difference":-18},"tilt":{"value":88,"t73":77,"difference":11}},"pros":[{"point":"Lighter than a diamond radiant square","figures":"1.25 vs 1.62 ct"}],"cons":[{"point":"Little fire, far below the diamond version","figures":"20 vs 62"},{"point":"More than three times the diamond version's leakage","figures":"41 vs 12"},{"point":"Less light than a round","figures":"57 vs 78"},{"point":"Fewer flashes than a round","figures":"66 vs 80"}]},{"cut":"triangle","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/triangle","headline":"Triangle Cut Emerald: more fire than a round, with the fewest facets we measure","summary":"Three sides and 19 facets, the fewest on our emerald pages. In emerald the triangle out-fires the round, and gives up most of its light, its sparkle and some face size.","scores_line":"Brilliance 27 · Fire 65 · Scintillation 34 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":57,"t73":73,"difference":-16},"brilliance":{"value":27,"t73":78,"difference":-51},"fire":{"value":65,"t73":39,"difference":26},"scintillation":{"value":34,"t73":80,"difference":-46},"spread":{"value":104,"t73":100,"difference":4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":36,"t73":84,"difference":-48},"tilt":{"value":100,"t73":77,"difference":23}},"pros":[{"point":"More fire than a round emerald","figures":"65 vs 39"},{"point":"Lighter than a diamond triangle","figures":"0.61 vs 0.79 ct"}],"cons":[{"point":"Much less light than a round","figures":"27 vs 78"},{"point":"The fewest flashes we measure in emerald","figures":"34 vs 80"},{"point":"Nearly twice the T73's leakage","figures":"43 vs 22"},{"point":"A smaller face for its weight than a round","figures":"89 vs 100"}]},{"cut":"hexagon","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/hexagon","headline":"Hexagon Cut Emerald: a six-sided outline, lighter in weight than the same cut in diamond","summary":"A step-cut crown over a tiered pavilion. In emerald our eight-sided octagon, built to the same tier profile, beats it on light, sparkle and leakage; the hexagon keeps a little more fire.","scores_line":"Brilliance 52 · Fire 41 · Scintillation 56 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":64,"t73":73,"difference":-9},"brilliance":{"value":52,"t73":78,"difference":-26},"fire":{"value":41,"t73":39,"difference":2},"scintillation":{"value":56,"t73":80,"difference":-24},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":69,"t73":84,"difference":-15},"tilt":{"value":100,"t73":77,"difference":23}},"pros":[{"point":"Lighter than a diamond hexagon","figures":"0.99 vs 1.29 ct"}],"cons":[{"point":"Far less fire than the diamond hexagon","figures":"41 vs 85"},{"point":"Less light than a round","figures":"52 vs 78"},{"point":"Fewer flashes than a round","figures":"56 vs 80"},{"point":"More leakage than the T73","figures":"37 vs 22"}]},{"cut":"octagon","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/octagon","headline":"Octagon Cut Emerald: nearly the light of the diamond octagon, for less weight","summary":"Eight sides, a stepped crown and a three-tier pavilion. In emerald the octagon returns nearly as much light as in diamond, more than any other step-cut outline we measure here.","scores_line":"Brilliance 69 · Fire 34 · Scintillation 66 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":67,"t73":73,"difference":-6},"brilliance":{"value":69,"t73":78,"difference":-9},"fire":{"value":34,"t73":39,"difference":-5},"scintillation":{"value":66,"t73":80,"difference":-14},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":90,"t73":84,"difference":6},"tilt":{"value":83,"t73":77,"difference":6}},"pros":[{"point":"Lighter than a diamond octagon","figures":"0.95 vs 1.23 ct"}],"cons":[{"point":"Much less fire than the diamond octagon","figures":"34 vs 76"},{"point":"Steadier than a round, not as steady as in diamond","figures":"83 vs 97"},{"point":"Fewer flashes than a round","figures":"66 vs 80"},{"point":"More leakage than in diamond","figures":"31 vs 18"}]},{"cut":"portuguese-birds-nest","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/portuguese-birds-nest","headline":"Portuguese Bird's Nest Cut Emerald: sparkle level with the highest we measure in this stone, and lighter in weight than diamond","summary":"177 facets woven in sixteen-fold tiers. In emerald its Scintillation, 98, is level with the highest we measure; its Fire is 2, and 58% of its light leaks.","scores_line":"Brilliance 42 · Fire 2 · Scintillation 98 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":55,"t73":73,"difference":-18},"brilliance":{"value":42,"t73":78,"difference":-36},"fire":{"value":2,"t73":39,"difference":-37},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":46,"t73":84,"difference":-38},"tilt":{"value":100,"t73":77,"difference":23}},"pros":[{"point":"Lighter than the diamond version","figures":"0.86 vs 1.11 ct"},{"point":"As fine a sparkle as any cut we measure in emerald","figures":"98 vs 80"}],"cons":[{"point":"Almost no fire","figures":"2 vs 65"},{"point":"Over half the light leaks","figures":"58 vs 13"},{"point":"About half the light of the diamond version","figures":"42 vs 85"}]},{"cut":"mazarin","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/mazarin","headline":"Mazarin Cut Emerald: lighter in weight than diamond, and more light than the Old Mine or the Peruzzi in this stone","summary":"A 42-facet cushion. In emerald it loses much of its light, and still returns more than the Peruzzi or the Old Mine.","scores_line":"Brilliance 46 · Fire 31 · Scintillation 61 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":58,"t73":73,"difference":-15},"brilliance":{"value":46,"t73":78,"difference":-32},"fire":{"value":31,"t73":39,"difference":-8},"scintillation":{"value":61,"t73":80,"difference":-19},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":49,"t73":84,"difference":-35},"tilt":{"value":98,"t73":77,"difference":21}},"pros":[{"point":"Lighter than a diamond Mazarin","figures":"1.02 vs 1.32 ct"}],"cons":[{"point":"Over half the light leaks","figures":"53 vs 17"},{"point":"Much less light than a round","figures":"46 vs 78"},{"point":"About half the diamond Mazarin's fire","figures":"31 vs 63"},{"point":"Fewer flashes than a round","figures":"61 vs 80"}]},{"cut":"peruzzi","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/peruzzi","headline":"Peruzzi Cut Emerald: a deep cushion, lighter in weight than the same cut in diamond","summary":"In diamond the Peruzzi returns the most light of our three historic cushions, 75. In emerald it returns the least of them, 30, with Fire 15.","scores_line":"Brilliance 30 · Fire 15 · Scintillation 81 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":49,"t73":73,"difference":-24},"brilliance":{"value":30,"t73":78,"difference":-48},"fire":{"value":15,"t73":39,"difference":-24},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":85,"t73":100,"difference":-15},"shape_norm":{"value":47,"t73":84,"difference":-37},"tilt":{"value":100,"t73":77,"difference":23}},"pros":[{"point":"Lighter than a diamond Peruzzi","figures":"1.02 vs 1.32 ct"}],"cons":[{"point":"Very little fire","figures":"15 vs 68"},{"point":"Most of the light escapes","figures":"69 vs 19"},{"point":"Less than half the T73's light","figures":"30 vs 78"},{"point":"A less regular pavilion","figures":"85 vs 100"}]},{"cut":"old-mine","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/old-mine","headline":"Old Mine Cut Emerald: a wide-table cushion, lighter in weight than in diamond","summary":"A wide table, a steep pavilion and a cushion outline. In emerald the Old Mine lets 60% of its light through the back and keeps about a third of the diamond version's fire.","scores_line":"Brilliance 40 · Fire 25 · Scintillation 81 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":56,"t73":73,"difference":-17},"brilliance":{"value":40,"t73":78,"difference":-38},"fire":{"value":25,"t73":39,"difference":-14},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":90,"t73":100,"difference":-10},"shape_norm":{"value":63,"t73":84,"difference":-21},"tilt":{"value":100,"t73":77,"difference":23}},"pros":[{"point":"Lighter than a diamond Old Mine","figures":"0.93 vs 1.21 ct"}],"cons":[{"point":"About a third of the diamond version's fire","figures":"25 vs 72"},{"point":"About half the T73's light","figures":"40 vs 78"},{"point":"Nearly three times the T73's leakage","figures":"60 vs 22"},{"point":"A slightly irregular pavilion","figures":"90 vs 100"}]},{"cut":"dg-bowtie","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/dg-bowtie","headline":"DG-Bowtie Emerald: nearly the most fire we measure in this stone","summary":"An 87-facet marquise cut 93.8% deep, nearly as deep as it is wide. In emerald it shows nearly the most fire we measure, and the least light.","scores_line":"Brilliance 13 · Fire 70 · Scintillation 86 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":50,"t73":73,"difference":-23},"brilliance":{"value":13,"t73":78,"difference":-65},"fire":{"value":70,"t73":39,"difference":31},"scintillation":{"value":86,"t73":80,"difference":6},"spread":{"value":87,"t73":100,"difference":-13},"symmetry":{"value":94,"t73":100,"difference":-6},"shape_norm":{"value":15,"t73":84,"difference":-69},"tilt":{"value":63,"t73":77,"difference":-14}},"pros":[{"point":"Far more fire than a round emerald","figures":"70 vs 39"},{"point":"Lighter than in diamond","figures":"2.44 vs 3.16 ct"},{"point":"A little more sparkle than a round","figures":"86 vs 80"}],"cons":[{"point":"The least light we measure in emerald","figures":"13 vs 78"},{"point":"Two-thirds of the light leaks","figures":"66 vs 22"},{"point":"Less steady when tipped than in diamond","figures":"63 vs 83"},{"point":"A smaller face for its weight than a round","figures":"92 vs 100"}]},{"cut":"dg-elongated-hexagon","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/dg-elongated-hexagon","headline":"DG-Elongated Hexagon Emerald: far more fire than any round we measure in this stone, and a larger face for its weight than the T73","summary":"Step cut alike on both faces, with a window at the back by design. In emerald it shows far more fire than a round and returns more light than in diamond.","scores_line":"Brilliance 25 · Fire 69 · Scintillation 51 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":48,"t73":73,"difference":-25},"brilliance":{"value":25,"t73":78,"difference":-53},"fire":{"value":69,"t73":39,"difference":30},"scintillation":{"value":51,"t73":80,"difference":-29},"spread":{"value":111,"t73":100,"difference":11},"symmetry":{"value":73,"t73":100,"difference":-27},"shape_norm":{"value":33,"t73":84,"difference":-51},"tilt":{"value":61,"t73":77,"difference":-16}},"pros":[{"point":"Far more fire than a round emerald","figures":"69 vs 39"},{"point":"Lighter than in diamond","figures":"1.39 vs 1.80 ct"},{"point":"A little more face for its weight than the T73","figures":"107 vs 100"}],"cons":[{"point":"Far less light than a round","figures":"25 vs 78"},{"point":"Over two-thirds of the light leaks","figures":"69 vs 22"},{"point":"Less steady when tipped than in diamond","figures":"61 vs 100"},{"point":"Fewer flashes than a round","figures":"51 vs 80"}]},{"cut":"dg-octagonal-kite","gemstone":"emerald","url":"https://digitalgemology.com/gemstones/emerald/dg-octagonal-kite","headline":"DG-Octagonal Kite Emerald: an eight-fold kite pattern, lighter in weight than in diamond","summary":"An eight-fold kite pattern: in emerald it returns 54 for Brilliance against 88 in diamond and leaks 45% of its light against 7%.","scores_line":"Brilliance 54 · Fire 40 · Scintillation 60 · in our census, where the T73 scores 78 · 39 · 80 in emerald","scores":{"global":{"value":64,"t73":73,"difference":-9},"brilliance":{"value":54,"t73":78,"difference":-24},"fire":{"value":40,"t73":39,"difference":1},"scintillation":{"value":60,"t73":80,"difference":-20},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":63,"t73":84,"difference":-21},"tilt":{"value":100,"t73":77,"difference":23}},"pros":[{"point":"Lighter than in diamond","figures":"0.96 vs 1.25 ct"}],"cons":[{"point":"About half the diamond version's fire","figures":"40 vs 82"},{"point":"Far more leakage than in diamond","figures":"45 vs 7"},{"point":"Much less light than the diamond version","figures":"54 vs 88"},{"point":"Fewer flashes than a round","figures":"60 vs 80"}]},{"cut":"baguette","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/baguette","headline":"Baguette Cut Amethyst: more fire than the round, in a slim step cut","summary":"A slim rectangle of 21 facets that splits a larger share of its returned light into colour than the round brilliant in quartz, 59 against 36, and shows a little more face for its weight. Light and sparkle are what it gives up.","scores_line":"Brilliance 40 · Fire 59 · Scintillation 43 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":48,"t73":70,"difference":-22},"brilliance":{"value":40,"t73":72,"difference":-32},"fire":{"value":59,"t73":36,"difference":23},"scintillation":{"value":43,"t73":80,"difference":-37},"spread":{"value":97,"t73":100,"difference":-3},"symmetry":{"value":39,"t73":100,"difference":-61},"shape_norm":{"value":52,"t73":77,"difference":-25},"tilt":{"value":62,"t73":80,"difference":-18}},"pros":[{"point":"Lighter than a diamond baguette","figures":"2.74 vs 3.64 ct"},{"point":"More fire than the round brilliant","figures":"59 vs 36"},{"point":"A little more face per carat","figures":"108 vs 100"}],"cons":[{"point":"The lowest Symmetry score we measure in amethyst","figures":"39 vs 100"},{"point":"Keeps less light when tipped than in diamond","figures":"62 vs 100"},{"point":"Few flashes as it moves","figures":"43 vs 80"},{"point":"Less light than the T73","figures":"40 vs 72"}]},{"cut":"emerald-cut","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/emerald-cut","headline":"Emerald Cut Amethyst: a little more face per carat than the round","summary":"The emerald cut keeps nearly all of its diamond brilliance in quartz, 53 against 55. What it gives up is fire, and its hold on light once the stone tips.","scores_line":"Brilliance 53 · Fire 32 · Scintillation 72 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":53,"t73":70,"difference":-17},"brilliance":{"value":53,"t73":72,"difference":-19},"fire":{"value":32,"t73":36,"difference":-4},"scintillation":{"value":72,"t73":80,"difference":-8},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":64,"t73":100,"difference":-36},"shape_norm":{"value":70,"t73":77,"difference":-7},"tilt":{"value":54,"t73":80,"difference":-26}},"pros":[{"point":"Three quarters of the diamond's weight","figures":"1.74 vs 2.31 ct"},{"point":"A little more face per carat than the round","figures":"105 vs 100"}],"cons":[{"point":"Far less fire than the diamond emerald cut","figures":"32 vs 87"},{"point":"A less regular pavilion than the round","figures":"64 vs 100"},{"point":"The weakest hold on light when tipped, in amethyst","figures":"54 vs 83"},{"point":"Less light than the T73","figures":"53 vs 72"}]},{"cut":"radiant","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/radiant","headline":"Radiant Cut Amethyst: more face per carat than all but two cuts we measure","summary":"The radiant faces up at 118 per carat against the T73's 100, behind only the marquise and the rectangle. In quartz, about three quarters of its light goes out through the back.","scores_line":"Brilliance 20 · Fire 41 · Scintillation 74 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":51,"t73":70,"difference":-19},"brilliance":{"value":20,"t73":72,"difference":-52},"fire":{"value":41,"t73":36,"difference":5},"scintillation":{"value":74,"t73":80,"difference":-6},"spread":{"value":105,"t73":100,"difference":5},"symmetry":{"value":99,"t73":100,"difference":-1},"shape_norm":{"value":24,"t73":77,"difference":-53},"tilt":{"value":100,"t73":80,"difference":20}},"pros":[{"point":"A quarter lighter than diamond","figures":"1.18 vs 1.56 ct"},{"point":"The third-largest face per carat we measure","figures":"118 vs 100"}],"cons":[{"point":"Under a third of the T73's light","figures":"20 vs 72"},{"point":"About three quarters of the light leaks","figures":"76 vs 28"},{"point":"Far less fire than the diamond radiant","figures":"41 vs 77"},{"point":"Slightly less sparkle than the round","figures":"74 vs 80"}]},{"cut":"rectangle","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/rectangle","headline":"Rectangle Cut Amethyst: the largest face per carat we measure, level with the marquise","summary":"In our census the rectangle shares the biggest face for its weight with the marquise. In quartz, light is what it gives away.","scores_line":"Brilliance 24 · Fire 50 · Scintillation 63 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":53,"t73":70,"difference":-17},"brilliance":{"value":24,"t73":72,"difference":-48},"fire":{"value":50,"t73":36,"difference":14},"scintillation":{"value":63,"t73":80,"difference":-17},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":31,"t73":77,"difference":-46},"tilt":{"value":100,"t73":80,"difference":20}},"pros":[{"point":"A quarter lighter than diamond","figures":"1.58 vs 2.10 ct"},{"point":"Tied for the largest face per carat we measure","figures":"121 vs 100"}],"cons":[{"point":"A third of the T73's light","figures":"24 vs 72"},{"point":"Nearly three quarters of the light leaks","figures":"72 vs 28"},{"point":"Less fire than the diamond rectangle","figures":"50 vs 77"},{"point":"Fewer flashes than a round","figures":"63 vs 80"}]},{"cut":"princess","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/princess","headline":"Princess Cut Amethyst: sharp square corners at three quarters of diamond's weight","summary":"The pointed square's facet plan scores 78 for sparkle, close to the round's 80. Fire and light are where it falls back in quartz.","scores_line":"Brilliance 45 · Fire 25 · Scintillation 78 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":56,"t73":70,"difference":-14},"brilliance":{"value":45,"t73":72,"difference":-27},"fire":{"value":25,"t73":36,"difference":-11},"scintillation":{"value":78,"t73":80,"difference":-2},"spread":{"value":95,"t73":100,"difference":-5},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":70,"t73":77,"difference":-7},"tilt":{"value":82,"t73":80,"difference":2}},"pros":[{"point":"Lighter than a diamond princess","figures":"1.11 vs 1.48 ct"}],"cons":[{"point":"Under a third of the diamond princess's fire","figures":"25 vs 83"},{"point":"Half the light leaks","figures":"50 vs 18"},{"point":"Under two thirds of the T73's light","figures":"45 vs 72"},{"point":"A little less steady when tipped than in diamond","figures":"82 vs 89"}]},{"cut":"radiant-square","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/radiant-square","headline":"Radiant Square Cut Amethyst: a cropped-corner square that weighs a quarter less than diamond","summary":"In diamond this square scores 72 for brilliance. In amethyst it loses nearly a third of that, and most of its fire.","scores_line":"Brilliance 51 · Fire 20 · Scintillation 66 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":57,"t73":70,"difference":-13},"brilliance":{"value":51,"t73":72,"difference":-21},"fire":{"value":20,"t73":36,"difference":-16},"scintillation":{"value":66,"t73":80,"difference":-14},"spread":{"value":101,"t73":100,"difference":1},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":60,"t73":77,"difference":-17},"tilt":{"value":87,"t73":80,"difference":7}},"pros":[{"point":"A quarter lighter than diamond, size for size","figures":"1.22 vs 1.62 ct"}],"cons":[{"point":"About a third of the diamond's fire","figures":"20 vs 62"},{"point":"Nearly half the light leaks","figures":"47 vs 12"},{"point":"Less light than the T73","figures":"51 vs 72"},{"point":"Fewer flashes than a round","figures":"66 vs 80"}]},{"cut":"triangle","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/triangle","headline":"Triangle Cut Amethyst: far more fire than the round, in a three-sided outline","summary":"Three sides, 19 facets, and a larger share of its returned light split into colour than the round brilliant in quartz, 61 against 36. It trails the round on light, sparkle and face-up size.","scores_line":"Brilliance 28 · Fire 61 · Scintillation 34 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":57,"t73":70,"difference":-13},"brilliance":{"value":28,"t73":72,"difference":-44},"fire":{"value":61,"t73":36,"difference":25},"scintillation":{"value":34,"t73":80,"difference":-46},"spread":{"value":104,"t73":100,"difference":4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":37,"t73":77,"difference":-40},"tilt":{"value":100,"t73":80,"difference":20}},"pros":[{"point":"More fire than the round brilliant","figures":"61 vs 36"},{"point":"Lighter than a diamond triangle","figures":"0.59 vs 0.79 ct"}],"cons":[{"point":"The least sparkle we measure in amethyst","figures":"34 vs 80"},{"point":"Well under half the T73's light","figures":"28 vs 72"},{"point":"More leakage than the diamond triangle","figures":"43 vs 25"},{"point":"The smallest face per carat we measure","figures":"89 vs 100"}]},{"cut":"hexagon","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/hexagon","headline":"Hexagon Cut Amethyst: six straight sides, a quarter lighter than diamond","summary":"A six-sided step-and-tier cut that keeps most of its diamond light in quartz and holds it when tipped. It loses over half its fire.","scores_line":"Brilliance 49 · Fire 39 · Scintillation 56 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":62,"t73":70,"difference":-8},"brilliance":{"value":49,"t73":72,"difference":-23},"fire":{"value":39,"t73":36,"difference":3},"scintillation":{"value":56,"t73":80,"difference":-24},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":64,"t73":77,"difference":-13},"tilt":{"value":100,"t73":80,"difference":20}},"pros":[{"point":"Three quarters of the diamond's weight","figures":"0.97 vs 1.29 ct"}],"cons":[{"point":"Under half the diamond hexagon's fire","figures":"39 vs 85"},{"point":"Fewer flashes than a round","figures":"56 vs 80"},{"point":"About two thirds of the T73's light","figures":"49 vs 72"},{"point":"More leakage than in diamond","figures":"40 vs 24"}]},{"cut":"octagon","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/octagon","headline":"Octagon Cut Amethyst: eight straight sides at three quarters of diamond's weight","summary":"In quartz the octagon returns more light than the Asscher, the emerald square or the emerald cut. Fire is what it gives up.","scores_line":"Brilliance 64 · Fire 28 · Scintillation 66 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":64,"t73":70,"difference":-6},"brilliance":{"value":64,"t73":72,"difference":-8},"fire":{"value":28,"t73":36,"difference":-8},"scintillation":{"value":66,"t73":80,"difference":-14},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":85,"t73":77,"difference":8},"tilt":{"value":83,"t73":80,"difference":3}},"pros":[{"point":"A quarter lighter than diamond","figures":"0.93 vs 1.23 ct"}],"cons":[{"point":"A little over a third of the diamond's fire","figures":"28 vs 76"},{"point":"Twice the diamond's leakage","figures":"36 vs 18"},{"point":"Holds less light when tipped than in diamond","figures":"83 vs 97"},{"point":"Fewer flashes than the round","figures":"66 vs 80"}]},{"cut":"portuguese-birds-nest","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/portuguese-birds-nest","headline":"Portuguese Bird's Nest Cut Amethyst: sparkle level with the highest we measure, from well over a hundred facets","summary":"A woven nest of 177 facets gives amethyst as much sparkle as any cut we measure. In quartz 63% of its light leaves through the back, against 13% in diamond.","scores_line":"Brilliance 37 · Fire 1 · Scintillation 98 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":52,"t73":70,"difference":-18},"brilliance":{"value":37,"t73":72,"difference":-35},"fire":{"value":1,"t73":36,"difference":-35},"scintillation":{"value":98,"t73":80,"difference":18},"spread":{"value":100,"t73":100,"difference":0},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":40,"t73":77,"difference":-37},"tilt":{"value":100,"t73":80,"difference":20}},"pros":[{"point":"Lighter than diamond","figures":"0.84 vs 1.11 ct"},{"point":"Sparkle level with the best we measure","figures":"98 vs 80"}],"cons":[{"point":"Almost no fire","figures":"1 vs 65"},{"point":"Most of the light leaks","figures":"63 vs 13"},{"point":"Under half the diamond's light","figures":"37 vs 85"}]},{"cut":"mazarin","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/mazarin","headline":"Mazarin Cut Amethyst: the brightest of our three historic cushions in quartz, a quarter lighter than diamond","summary":"Dimmer than the round in quartz, 43 against 72, and still the brightest of the three historic cushions we measure in amethyst.","scores_line":"Brilliance 43 · Fire 28 · Scintillation 61 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":57,"t73":70,"difference":-13},"brilliance":{"value":43,"t73":72,"difference":-29},"fire":{"value":28,"t73":36,"difference":-8},"scintillation":{"value":61,"t73":80,"difference":-19},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":46,"t73":77,"difference":-31},"tilt":{"value":98,"t73":80,"difference":18}},"pros":[{"point":"Lighter than the diamond Mazarin","figures":"1.00 vs 1.32 ct"}],"cons":[{"point":"Over half the light leaks","figures":"56 vs 17"},{"point":"Under half the diamond Mazarin's fire","figures":"28 vs 63"},{"point":"Less light than the T73","figures":"43 vs 72"},{"point":"Fewer flashes than a round","figures":"61 vs 80"}]},{"cut":"peruzzi","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/peruzzi","headline":"Peruzzi Cut Amethyst: a historic cushion, a quarter lighter than diamond at the same size","summary":"In diamond the Peruzzi is the brightest historic cushion we measure, at 75. In quartz it returns about a third of that light, and nearly three quarters leaks out of the back.","scores_line":"Brilliance 26 · Fire 13 · Scintillation 81 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":47,"t73":70,"difference":-23},"brilliance":{"value":26,"t73":72,"difference":-46},"fire":{"value":13,"t73":36,"difference":-23},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":85,"t73":100,"difference":-15},"shape_norm":{"value":41,"t73":77,"difference":-36},"tilt":{"value":100,"t73":80,"difference":20}},"pros":[{"point":"Lighter than a diamond Peruzzi","figures":"0.99 vs 1.32 ct"}],"cons":[{"point":"Under a fifth of the diamond's fire","figures":"13 vs 68"},{"point":"Nearly three quarters of the light leaks","figures":"73 vs 19"},{"point":"About a third of the diamond's light","figures":"26 vs 75"},{"point":"A less regular pavilion than a round","figures":"85 vs 100"}]},{"cut":"old-mine","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/old-mine","headline":"Old Mine Cut Amethyst: a historic cushion at three quarters of diamond's weight","summary":"The historic cushion's facet plan scores 81 for sparkle, level with the T73's 80. Its light falls to about half the round's, and its fire to under a third of diamond's.","scores_line":"Brilliance 38 · Fire 22 · Scintillation 81 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":54,"t73":70,"difference":-16},"brilliance":{"value":38,"t73":72,"difference":-34},"fire":{"value":22,"t73":36,"difference":-14},"scintillation":{"value":81,"t73":80,"difference":1},"spread":{"value":98,"t73":100,"difference":-2},"symmetry":{"value":90,"t73":100,"difference":-10},"shape_norm":{"value":59,"t73":77,"difference":-18},"tilt":{"value":100,"t73":80,"difference":20}},"pros":[{"point":"Lighter than the diamond version","figures":"0.91 vs 1.21 ct"}],"cons":[{"point":"Under a third of the diamond's fire","figures":"22 vs 72"},{"point":"About half the T73's light","figures":"38 vs 72"},{"point":"Over three fifths of the light leaks","figures":"62 vs 28"},{"point":"A less even pavilion than the round","figures":"90 vs 100"}]},{"cut":"dg-bowtie","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/dg-bowtie","headline":"DG-Bowtie Amethyst: more fire than the round, in a deep marquise outline","summary":"A deep, long brilliant: in quartz it splits a larger share of its returned light into colour than the round, and returns less light than any other cut we measure in amethyst.","scores_line":"Brilliance 12 · Fire 64 · Scintillation 86 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":49,"t73":70,"difference":-21},"brilliance":{"value":12,"t73":72,"difference":-60},"fire":{"value":64,"t73":36,"difference":28},"scintillation":{"value":86,"t73":80,"difference":6},"spread":{"value":87,"t73":100,"difference":-13},"symmetry":{"value":94,"t73":100,"difference":-6},"shape_norm":{"value":14,"t73":77,"difference":-63},"tilt":{"value":68,"t73":80,"difference":-12}},"pros":[{"point":"More fire than the round brilliant","figures":"64 vs 36"},{"point":"Lighter than diamond","figures":"2.38 vs 3.16 ct"},{"point":"A little more sparkle than the round","figures":"86 vs 80"}],"cons":[{"point":"The least light of any amethyst cut we measure","figures":"12 vs 72"},{"point":"Seven tenths of the light leaks","figures":"70 vs 28"},{"point":"Loses more light when tipped than in diamond","figures":"68 vs 83"},{"point":"Smaller per carat than the round","figures":"92 vs 100"}]},{"cut":"dg-elongated-hexagon","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/dg-elongated-hexagon","headline":"DG-Elongated Hexagon Amethyst: a step cut finished on both sides, with more face per carat than the round","summary":"Finished alike front and back, with a flat behind the table that is a window on purpose. In quartz it faces up a little larger per carat than the round, and lets most of its light through.","scores_line":"Brilliance 25 · Fire 64 · Scintillation 51 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":47,"t73":70,"difference":-23},"brilliance":{"value":25,"t73":72,"difference":-47},"fire":{"value":64,"t73":36,"difference":28},"scintillation":{"value":51,"t73":80,"difference":-29},"spread":{"value":111,"t73":100,"difference":11},"symmetry":{"value":73,"t73":100,"difference":-27},"shape_norm":{"value":33,"t73":77,"difference":-44},"tilt":{"value":65,"t73":80,"difference":-15}},"pros":[{"point":"Lighter than diamond","figures":"1.36 vs 1.80 ct"},{"point":"A little more face per carat than the round","figures":"107 vs 100"}],"cons":[{"point":"About a third of the T73's light","figures":"25 vs 72"},{"point":"Most of the light leaves through the back","figures":"70 vs 28"},{"point":"Less steady when tipped than in diamond","figures":"65 vs 100"},{"point":"Less fire than in diamond","figures":"64 vs 97"}]},{"cut":"dg-octagonal-kite","gemstone":"amethyst","url":"https://digitalgemology.com/gemstones/amethyst/dg-octagonal-kite","headline":"DG-Octagonal Kite Amethyst: an eight-fold kite pattern, a quarter lighter than diamond","summary":"In diamond this kite pattern leaks very little light. In quartz half of it leaves through the back, though the pavilion still clears the critical angle.","scores_line":"Brilliance 50 · Fire 33 · Scintillation 60 · in our census, where the T73 scores 72 · 36 · 80 in amethyst","scores":{"global":{"value":60,"t73":70,"difference":-10},"brilliance":{"value":50,"t73":72,"difference":-22},"fire":{"value":33,"t73":36,"difference":-3},"scintillation":{"value":60,"t73":80,"difference":-20},"spread":{"value":96,"t73":100,"difference":-4},"symmetry":{"value":100,"t73":100,"difference":0},"shape_norm":{"value":58,"t73":77,"difference":-19},"tilt":{"value":100,"t73":80,"difference":20}},"pros":[{"point":"A quarter lighter than diamond","figures":"0.94 vs 1.25 ct"}],"cons":[{"point":"Two fifths of the diamond's fire","figures":"33 vs 82"},{"point":"Half the light leaks","figures":"50 vs 7"},{"point":"Far less light than the same kite in diamond","figures":"50 vs 88"},{"point":"Fewer flashes than the round","figures":"60 vs 80"}]}]}