---
title: "Radiant Cut 3D Model: STEP, STL, OBJ, GLB"
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."
url: https://digitalgemology.com/cuts/radiant
image: https://digitalgemology.com/img/cuts/radiant-og.jpg?v=69b48ba5
---

> Markdown copy of https://digitalgemology.com/cuts/radiant. 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)

# Radiant Cut

**Buy (instant download, personal-use license):** [3D files · €9.99](https://digitalgemology.lemonsqueezy.com/checkout/buy/37db9344-72d1-4dac-89e9-88dc3539c639) · [Radiant Cut 3D files, €9.99 · Personal use](https://digitalgemology.lemonsqueezy.com/checkout/buy/37db9344-72d1-4dac-89e9-88dc3539c639) · [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 · 74 facets · 9.06 x 7.06 mm

The radiant: the outline of a step cut, with cropped corners, and a brilliant facet plan. It combines the clean shape of an emerald cut with the sparkle of a brilliant.

[3D files · €9.99](https://digitalgemology.lemonsqueezy.com/checkout/buy/37db9344-72d1-4dac-89e9-88dc3539c639)

Instant download · [Personal-use license](https://digitalgemology.com/licence) · [What is in the files](https://digitalgemology.com/cuts/radiant#buy) · [Grade it in 3D](https://digitalgemology.com/tools/3d_gemstone_simulator?cut=radiant)

## About the Radiant Cut

The radiant: the outline of a step cut, with cropped corners, and a brilliant facet plan. It combines the clean shape of an emerald cut with the sparkle of a brilliant.

A strong choice for colored stones, where the mixed facets help spread color evenly.

## Radiant Cut specifications

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

**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

## Face-up and profile

*Face-up facet diagram of the Radiant Cut*

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

*Side profile of the Radiant Cut*

Profile: 53.8% total depth.

![Light Return map of the Radiant Cut in diamond: a computed render showing direct, indirect and contrast light across the face-up stone.](https://digitalgemology.com/img/cuts/radiant-lightmap.webp?v=96ed68b5)

Light Return map of the Radiant Cut in diamond. A computed render of the model's geometry, not a photograph.

## Cut Performance Index

- Diamond **65.1** overall, 34th of 37
- Moissanite **69.2** overall, 34th of 37
- Cubic Zirconia **68.1** overall, 34th of 37
- Ruby **59.2** overall, 31st of 37
- Sapphire **59.2** overall, 31st of 37
- Emerald **54.3** overall, 32nd of 37
- Amethyst **50.8** overall, 32nd of 37

[See how every cut compares](https://digitalgemology.com/learn/cut-performance-index)

## How the Radiant Cut performs in seven gemstones

**The Radiant Cut performs best in moissanite, where its brilliance and fire together are highest: 33 for brilliance and 92 for fire.** In diamond it scores 32 for brilliance and 77 for fire, against 93 and 78 for the T73 benchmark. Its scintillation, 74, comes from its pattern of facets, so it is the same in every stone.

**Brilliance, fire and scintillation of the Radiant Cut in seven gemstones, out of 100, with the T73 Round Brilliant benchmark in each**

| Gemstone | Brilliance | Fire | Scintillation |
| --- | --- | --- | --- |
| [Diamond](https://digitalgemology.com/gemstones/diamond) | 32 (T73 benchmark 93) | 77 (T73 benchmark 78) | 74 (T73 benchmark 80) |
| [Moissanite](https://digitalgemology.com/gemstones/moissanite) *Best overall* *Highest brilliance* *Highest fire* | 33 (T73 benchmark 86) | 92 (T73 benchmark 97) | 74 (T73 benchmark 80) |
| [Cubic Zirconia](https://digitalgemology.com/gemstones/cubic-zirconia) *Highest brilliance* | 33 (T73 benchmark 98) | 91 (T73 benchmark 87) | 74 (T73 benchmark 80) |
| [Ruby](https://digitalgemology.com/gemstones/ruby) | 26 (T73 benchmark 94) | 69 (T73 benchmark 37) | 74 (T73 benchmark 80) |
| [Sapphire](https://digitalgemology.com/gemstones/sapphire) | 26 (T73 benchmark 94) | 69 (T73 benchmark 37) | 74 (T73 benchmark 80) |
| [Emerald](https://digitalgemology.com/gemstones/emerald) | 22 (T73 benchmark 78) | 56 (T73 benchmark 39) | 74 (T73 benchmark 80) |
| [Amethyst](https://digitalgemology.com/gemstones/amethyst) | 20 (T73 benchmark 72) | 41 (T73 benchmark 36) | 74 (T73 benchmark 80) |

Score out of 100 T73 Round Brilliant, our benchmark, in the same stone **Best 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](https://digitalgemology.com/tools/cut-performance-wheel?cut=radiant&stone=moissanite), where you can compare the Radiant Cut with any other cut. A simulation of the geometry, not a grading report.

### 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° | 96% | 2.00 ct | Minor windowing |
| [Moissanite](https://digitalgemology.com/gemstones/moissanite) | 2.648 to 2.691 | 22.2° | 96% | 1.83 ct | Minor windowing |
| [Cubic Zirconia](https://digitalgemology.com/gemstones/cubic-zirconia) | 2.15 to 2.18 | 27.7° | 96% | 3.30 ct | Minor windowing |
| [Ruby](https://digitalgemology.com/gemstones/ruby) | 1.762 to 1.770 | 34.6° | 38% | 2.27 ct | Steepen the pavilion |
| [Sapphire](https://digitalgemology.com/gemstones/sapphire) | 1.762 to 1.770 | 34.6° | 38% | 2.27 ct | Steepen the pavilion |
| [Emerald](https://digitalgemology.com/gemstones/emerald) | 1.577 to 1.583 | 39.4° | 29% | 1.55 ct | Steepen the pavilion |
| [Amethyst](https://digitalgemology.com/gemstones/amethyst) | 1.544 to 1.553 | 40.4° | 29% | 1.51 ct | Steepen the pavilion |

Head-on light, first reflection. The [3D Gemstone Simulator](https://digitalgemology.com/tools/3d_gemstone_simulator?cut=radiant) traces the full Light Return in each of these gemstones.

## Available in…

The Radiant Cut stone by stone: what each gemstone gains and loses in this cut, measured.

- [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)

![Radiant Cut 3D model](https://digitalgemology.com/img/cuts/radiant-3d.webp?v=70341719)

## Grade the Radiant 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=radiant)

## Radiant Cut: questions

### What files come with the Radiant 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 74 planar facets.

### Is there a faceting diagram for the Radiant Cut?

The faceting design for the Radiant 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 Radiant Cut work in sapphire, emerald or amethyst?

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 we advise a steeper pavilion.

### How accurate is the Radiant Cut cutting file?

The cutting file for the Radiant 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 Radiant Cut model, and what does it weigh?

The model measures 9.06 x 7.06 x 3.79 mm, which is 2.00 ct in diamond. At the same size, it 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. 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 Radiant 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)
- [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)
- [Heart Cut](https://digitalgemology.com/cuts/heart)
- [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 Radiant Cut files

*6 formats* *Millimeters* *Watertight*

### Radiant Cut 3D files

The Radiant Cut as exact geometry: 74 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/37db9344-72d1-4dac-89e9-88dc3539c639)

*In preparation*

### Radiant Cut cutting files

The faceting design for the Radiant 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 Radiant 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).