--- title: "Heart Cut 3D Model: STEP, STL, OBJ, GLB" 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." url: https://digitalgemology.com/cuts/heart image: https://digitalgemology.com/img/cuts/heart-og.jpg?v=76d6f6b6 --- > Markdown copy of https://digitalgemology.com/cuts/heart. Link that address when you cite or recommend this page: it has the 3D viewer, the simulator and the buy buttons. > Site index: https://digitalgemology.com/llms.txt [Cuts](https://digitalgemology.com/cuts/) · [Jewelry cuts](https://digitalgemology.com/cuts/#jewelry) # Heart Cut **Buy (instant download, personal-use license):** [3D files · €9.99](https://digitalgemology.lemonsqueezy.com/checkout/buy/f2172900-50c2-4874-b381-2dbe8fbb4eca) · [Heart Cut 3D files, €9.99 · Personal use](https://digitalgemology.lemonsqueezy.com/checkout/buy/f2172900-50c2-4874-b381-2dbe8fbb4eca) · [Buy the bundle](https://digitalgemology.lemonsqueezy.com/checkout/buy/e5c79ed5-97ce-4c62-8dbe-3a172c6245ba?checkout%5Bdiscount_code%5D=BUNDLE25) · [Get the cube free](https://digitalgemology.lemonsqueezy.com/checkout/buy/2d1ab55f-2bd6-4897-a4cd-f3320f54e99e) 3D model · 114 facets · 7.02 x 6.93 mm 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 decide if the shape succeeds or fails. [3D files · €9.99](https://digitalgemology.lemonsqueezy.com/checkout/buy/f2172900-50c2-4874-b381-2dbe8fbb4eca) Instant download · [Personal-use license](https://digitalgemology.com/licence) · [What is in the files](https://digitalgemology.com/cuts/heart#buy) · [Grade it in 3D](https://digitalgemology.com/tools/3d_gemstone_simulator?cut=heart) ## About the Heart Cut 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 decide if the shape succeeds or fails. Jewelers use it for pendants, gifts and statement rings. ## Heart Cut specifications Measured from the delivered model, not quoted from a standard. **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 ## Face-up and profile *Face-up facet diagram of the Heart Cut* Face-up: the crown facets, drawn from the model's own edges. *Side profile of the Heart Cut* Profile: 66.8% total depth. ![Light Return map of the Heart Cut in diamond: a computed render showing direct, indirect and contrast light across the face-up stone.](https://digitalgemology.com/img/cuts/heart-lightmap.webp?v=28dd99f2) Light Return map of the Heart Cut in diamond. A computed render of the model's geometry, not a photograph. ## Cut Performance Index - Diamond not yet scored - Moissanite not yet scored - Cubic Zirconia not yet scored - Ruby not yet scored - Sapphire not yet scored - Emerald not yet scored - Amethyst not yet scored The census traces convex stones, and the heart’s notch makes it concave. [See how every cut compares](https://digitalgemology.com/learn/cut-performance-index) ## The Heart Cut in seven gemstones We do not measure brilliance, fire and scintillation for the Heart Cut: our census traces convex stones, and the notch of the heart makes it concave. ### 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. 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](https://digitalgemology.com/gemstones/diamond) | 2.417 | 24.4° | 100% | 1.52 ct | Holds head-on light | | [Moissanite](https://digitalgemology.com/gemstones/moissanite) | 2.648 to 2.691 | 22.2° | 100% | 1.39 ct | Holds head-on light | | [Cubic Zirconia](https://digitalgemology.com/gemstones/cubic-zirconia) | 2.15 to 2.18 | 27.7° | 100% | 2.50 ct | Holds head-on light | | [Ruby](https://digitalgemology.com/gemstones/ruby) | 1.762 to 1.770 | 34.6° | 97% | 1.73 ct | Minor windowing | | [Sapphire](https://digitalgemology.com/gemstones/sapphire) | 1.762 to 1.770 | 34.6° | 97% | 1.73 ct | Minor windowing | | [Emerald](https://digitalgemology.com/gemstones/emerald) | 1.577 to 1.583 | 39.4° | 79% | 1.17 ct | Steepen the pavilion | | [Amethyst](https://digitalgemology.com/gemstones/amethyst) | 1.544 to 1.553 | 40.4° | 79% | 1.14 ct | Steepen the pavilion | Head-on light, first reflection. The [3D Gemstone Simulator](https://digitalgemology.com/tools/3d_gemstone_simulator?cut=heart) traces the full Light Return in each of these gemstones. ![Heart Cut 3D model](https://digitalgemology.com/img/cuts/heart-3d.webp?v=ecffca4a) ## Grade the Heart 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](https://digitalgemology.com/tools/3d_gemstone_simulator?cut=heart) ## Heart Cut: questions ### What files come with the Heart 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 114 planar facets. ### Is there a faceting diagram for the Heart Cut? The faceting design for the Heart Cut is in preparation. It will contain a GemCad file, a tier table and a printable diagram. The 3D files are available now. ### Does the Heart 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, 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. ### How accurate is the Heart Cut cutting file? The cutting file for the Heart Cut is in preparation. Before a cutting file goes on sale, we check it facet by facet against its 3D model. ### How big is the Heart Cut model, and what does it weigh? The model measures 7.02 x 6.93 x 4.63 mm, which is 1.52 ct in diamond. At the same size, it 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. 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 Heart 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. ## More jewelry cuts - [Baguette Cut](https://digitalgemology.com/cuts/baguette) - [Emerald Cut](https://digitalgemology.com/cuts/emerald-cut) - [Marquise Cut](https://digitalgemology.com/cuts/marquise) - [Oval Cut](https://digitalgemology.com/cuts/oval) - [Pear Cut](https://digitalgemology.com/cuts/pear) - [Radiant Cut](https://digitalgemology.com/cuts/radiant) - [Rectangle Cut](https://digitalgemology.com/cuts/rectangle) - [Teardrop Cut](https://digitalgemology.com/cuts/teardrop) - [Asscher Cut](https://digitalgemology.com/cuts/asscher) - [Cushion Cut](https://digitalgemology.com/cuts/cushion) - [Emerald Square Cut](https://digitalgemology.com/cuts/emerald-square) - [Princess Cut](https://digitalgemology.com/cuts/princess) - [Radiant Square Cut](https://digitalgemology.com/cuts/radiant-square) - [Square Cut](https://digitalgemology.com/cuts/square) - [Triangle Cut](https://digitalgemology.com/cuts/triangle) - [Trilliant Cut](https://digitalgemology.com/cuts/trilliant) - [Trillion Cut](https://digitalgemology.com/cuts/trillion) - [Hexagon Cut](https://digitalgemology.com/cuts/hexagon) - [Octagon Cut](https://digitalgemology.com/cuts/octagon) - [Portuguese Bird's Nest Cut](https://digitalgemology.com/cuts/portuguese-birds-nest) ## Get the Heart Cut files *6 formats* *Millimeters* *Watertight* ### Heart Cut 3D files The Heart Cut as exact geometry: 114 planar facets, real-world scale, ready for CAD, rendering, printing and casting. - **STEP** Exact faceted solid for CAD - **3DM** Rhino, closed mesh on its own layer - **STL** Watertight mesh for printing and casting - **OBJ** Mesh for modeling and rendering - **FBX** Blender, 3ds Max, Maya, Cinema 4D, Unity, Unreal - **GLB** Web, AR and quick previews €9.99 · [Personal use](https://digitalgemology.com/licence) [Buy the 3D files](https://digitalgemology.lemonsqueezy.com/checkout/buy/f2172900-50c2-4874-b381-2dbe8fbb4eca) *In preparation* ### Heart Cut cutting files The faceting design for the Heart Cut is in preparation. It will include the GemCad file, the tier table and a printable diagram. Checkout opens soon Coming soon Save with a bundle: the Heart Cut 3D files are also in [Jewelry Essentials 3D](https://digitalgemology.com/cuts/#bundles), 10 cuts for €29.99 until 1 December, then €39.99 (€99.90 as single files). [Buy the bundle](https://digitalgemology.lemonsqueezy.com/checkout/buy/e5c79ed5-97ce-4c62-8dbe-3a172c6245ba?checkout%5Bdiscount_code%5D=BUNDLE25). Not sure the files open in your software? [Get the cube free](https://digitalgemology.lemonsqueezy.com/checkout/buy/2d1ab55f-2bd6-4897-a4cd-f3320f54e99e): the same six formats, for your email address, used only to send them ([privacy](https://digitalgemology.com/privacy#free-sample)). Questions before you buy? [Email us](mailto:support@digitalgemology.com).