DG-Miliano Cut: 3D Model & Faceting Diagram

About the DG-Miliano Cut

DG-Miliano is a round brilliant drawn for moissanite. It has eight stars, eight crown mains and sixteen upper girdle facets around the table, over a girdle of ninety-six facets.

Its pavilion has three tiers of sixteen, steepest at the girdle and shallowest at the point. The girdle is thin.

DG-Miliano Cut specifications

Measured from the delivered model, not quoted from a standard.

CategoryHouse cuts

Facets177 planar facets (81 + 96 girdles = 177)

OutlineLength to width 1.000

Total depth60.3% of width

Crown angle (main)32.0°

Pavilion angle (main)38.3°

Reference size8.15 x 8.15 x 4.92 mm at 2.03 ct in diamond

Volume115.38 mm³

Cutting file accuracyEvery crown and pavilion facet within under 0.001° of the 3D model (average under 0.001°)

Index gear96

Symmetry8-fold mirror-image symmetry

Tiers3 crown, 3 pavilion

FilesSTEP, 3DM, STL, OBJ, FBX, GLB, GemCad .asc, tier table, diagram

Face-up and profile

Face-up: the crown facets, drawn from the model's own edges.

Profile: 60.3% total depth.

Light Return map of the DG-Miliano Cut in moissanite: a computed render showing direct, indirect and contrast light across the face-up stone. — Light Return map of the DG-Miliano Cut in moissanite. A computed render of the model's geometry, not a photograph.

Cut Performance Index

Diamond 92.7 overall, 1st of 37
Moissanite 92.0 overall, 3rd of 37
Cubic Zirconia 94.9 overall, 2nd of 37
Ruby 79.6 overall, joint 4th of 37
Sapphire 79.6 overall, joint 4th of 37
Emerald 70.9 overall, 7th of 37
Amethyst 67.5 overall, 11th of 37

Also scored in 19 more gemstones

Topaz 73.0 overall, 7th of 37
Spinel 79.7 overall, 7th of 37
Demantoid 91.3 overall, 2nd of 37
Zircon 90.2 overall, 1st of 37
Tourmaline 76.2 overall, 7th of 37
Peridot 78.4 overall, 8th of 37
Tanzanite 78.7 overall, joint 6th of 37
YAG 83.7 overall, joint 4th of 37
Pyrope 80.6 overall, 7th of 37
Almandine 82.9 overall, joint 5th of 37
Spessartine 83.1 overall, 5th of 37
Grossular 82.4 overall, 6th of 37
Chrysoberyl 78.0 overall, 4th of 37
Kunzite 77.5 overall, 7th of 37
Iolite 72.2 overall, joint 8th of 37
Morganite 71.4 overall, 7th of 37
GGG 91.4 overall, 1st of 37
Strontium titanate 95.3 overall, 2nd of 37
Synthetic rutile 90.2 overall, 6th of 37

See how every cut compares

How the DG-Miliano Cut performs in seven gemstones

The DG-Miliano Cut was drawn for moissanite, where it scores 86 for brilliance and 93 for fire. It performs best in cubic zirconia, where its brilliance and fire together are highest: 97 for brilliance and 90 for fire. In diamond it scores 95 for brilliance and 82 for fire, against 93 and 78 for the T73 benchmark. Its scintillation, 98, comes from its pattern of facets, so it is the same in every stone.

Brilliance, fire and scintillation of the DG-Miliano Cut in seven gemstones, out of 100, with the T73 Round Brilliant benchmark in each
Gemstone	Brilliance	Fire	Scintillation
Diamond	95 (T73 benchmark 93)	82 (T73 benchmark 78)	98 (T73 benchmark 80)
MoissaniteHighest fire	86 (T73 benchmark 86)	93 (T73 benchmark 97)	98 (T73 benchmark 80)
Cubic ZirconiaBest overallHighest brilliance	97 (T73 benchmark 98)	90 (T73 benchmark 87)	98 (T73 benchmark 80)
Ruby	90 (T73 benchmark 94)	35 (T73 benchmark 37)	98 (T73 benchmark 80)
Sapphire	90 (T73 benchmark 94)	35 (T73 benchmark 37)	98 (T73 benchmark 80)
Emerald	67 (T73 benchmark 78)	34 (T73 benchmark 39)	98 (T73 benchmark 80)
Amethyst	60 (T73 benchmark 72)	28 (T73 benchmark 36)	98 (T73 benchmark 80)

Score out of 100T73 Round Brilliant, our benchmark, in the same stoneBest overall: the highest brilliance and fire together

Brilliance is the share of face-up light that the stone returns. Fire is the share of that light that splits into color. Both come from our face-up light census. Scintillation is the sparkle that the facets give as the stone moves, and we read it from its facets. They are the same figures as the Cut Performance Wheel, where you can compare the DG-Miliano Cut with any other cut. A simulation of the geometry, not a grading report.

Also scored, with the same census, in 19 more gemstones: topaz, spinel, demantoid, zircon, tourmaline, peridot, tanzanite, YAG, pyrope, almandine, spessartine, grossular, chrysoberyl, kunzite, iolite, morganite, GGG, strontium titanate and synthetic rutile. Their head-on figures are in the table below.

Head-on reflection, critical angle and weight in each stone

The same geometry behaves differently in every material. Light that meets a pavilion facet at less than the critical angle of the stone does not reflect. It passes straight out of the back and shows face-up as a window. For each stone, we measured how much of the pavilion of this model, seen face-down, is steeper than that angle. We also measured what the model weighs at its reference size. The pavilion mains of this design sit at 38.3°. A round design needs at least 40.4° in amethyst for head-on light to reflect off both sides of the pavilion and leave through the table. So it is worth making the mains steeper for emerald, amethyst.

Head-on light in amethyst: a steep facet reflects it, a shallow facet lets it out of the back.

Stone	Refractive index	Critical angle	Pavilion reflecting head-on light	Weight at this size	Verdict
Diamond	2.417	24.4°	100%	2.03 ct	Holds head-on light
Moissanite	2.648 to 2.691	22.2°	100%	1.86 ct	Holds head-on light
Cubic Zirconia	2.15 to 2.18	27.7°	100%	3.35 ct	Holds head-on light
Ruby	1.762 to 1.770	34.6°	100%	2.31 ct	Holds head-on light
Sapphire	1.762 to 1.770	34.6°	100%	2.31 ct	Holds head-on light
Emerald	1.577 to 1.583	39.4°	88%	1.57 ct	Steepen the pavilion
Amethyst	1.544 to 1.553	40.4°	88%	1.53 ct	Steepen the pavilion
Topaz	1.606 to 1.644	38.5°	88%	2.04 ct	Steepen the pavilion
Spinel	1.712 to 1.747	35.7°	100%	2.09 ct	Holds head-on light
Demantoid	1.881 to 1.888	32.1°	100%	2.22 ct	Holds head-on light
Zircon	1.925 to 1.984	31.3°	100%	2.69 ct	Holds head-on light
Tourmaline	1.603 to 1.655	38.6°	88%	1.81 ct	Steepen the pavilion
Peridot	1.650 to 1.690	37.3°	100%	1.93 ct	Holds head-on light
Tanzanite	1.685 to 1.707	36.4°	100%	1.93 ct	Holds head-on light
YAG	1.833	33.1°	100%	2.62 ct	Holds head-on light
Pyrope	1.730 to 1.766	35.3°	100%	2.17 ct	Holds head-on light
Almandine	1.750 to 1.830	34.8°	100%	2.38 ct	Holds head-on light
Spessartine	1.790 to 1.830	34.0°	100%	2.40 ct	Holds head-on light
Grossular	1.730 to 1.760	35.3°	100%	2.10 ct	Holds head-on light
Chrysoberyl	1.746 to 1.755	34.9°	100%	2.15 ct	Holds head-on light
Kunzite	1.660 to 1.676	37.0°	100%	1.83 ct	Holds head-on light
Iolite	1.542 to 1.551	40.4°	88%	1.51 ct	Steepen the pavilion
Morganite	1.572 to 1.600	39.5°	88%	1.65 ct	Steepen the pavilion
GGG	1.970	30.5°	100%	4.07 ct	Holds head-on light
Strontium titanate	2.409	24.5°	100%	2.96 ct	Holds head-on light
Synthetic rutile	2.616 to 2.903	22.5°	100%	2.46 ct	Holds head-on light

Head-on light, first reflection. The 3D Gemstone Simulator traces the full Light Return in each of these gemstones.

Available in…

The DG-Miliano stone by stone: what each gemstone gains and loses in this cut, measured.

Grade the DG-Miliano Cut in 3D

Open it in the 3D Gemstone Simulator. Set its carat, color, clarity and cut grade in any of seven gemstones. Turn it under ten kinds of light, and watch its 3D gemstone report change as you go. Free, in your browser.

Open it in the Simulator

DG-Miliano Cut: questions

What files come with the DG-Miliano Cut 3D model?

Six formats. STEP is the exact faceted solid for CAD, and 3DM is for Rhino. STL and OBJ are meshes. FBX is for Blender, 3ds Max, Maya, Cinema 4D, Unity and Unreal. GLB is for the web and AR. All are in millimeters at real-world scale, with 177 planar facets.

Is there a faceting diagram for the DG-Miliano Cut?

Yes. The cutting files contain a GemCad .asc design (81 + 96 girdles = 177 facets, 96 index, 8-fold mirror-image symmetry) and a printable faceting diagram. They also contain a tier table in CSV, with the angles, indices and cutting order.

Does the DG-Miliano Cut work in sapphire, emerald or amethyst?

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 we advise a steeper pavilion. The pavilion mains of this design sit at 38.3°. A round design needs at least 40.4° in amethyst for head-on light to reflect off both sides of the pavilion and leave through the table. So it is worth making the mains steeper for emerald, amethyst.

How accurate is the DG-Miliano Cut cutting file?

We check it facet by facet against the 3D model that 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 that you render or set.

How big is the DG-Miliano Cut model, and what does it weigh?

The model measures 8.15 x 8.15 x 4.92 mm, which is 2.03 ct in diamond. At the same size, it 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. You can scale it uniformly to any size: the weight follows the cube of the size.

Twice the size holds eight times the material, so it weighs eight times as much.

Can I 3D print or cast the DG-Miliano Cut model?

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.