The internet is full of gemstone files. Most come from anonymous designers, with one photo and no data. You can’t tell whether that round brilliant is really a round brilliant, or how it will perform in the stone you plan to cut.
We built Digital Gemology to fix that. Every design is constructed from its angles, cross-checked across every file format, and open to testing before you buy.
Everything in one place
The pieces have always existed, just never together. One site has a beautiful viewer you can’t adjust. Another explains the four Cs clearly but never shows them to you. GemCad, GemRay, GemCut Studio and FreeCAD are superb tools, built for people who already know what they’re doing.
Our simulator brings those worlds into one place. Change the cut, the material, the colour or the lighting, and watch the stone respond. There is no wrong setting and nothing to break. If a choice confuses you, choose something else and you’re back on solid ground.
What you’ll find
3D files for jewellery designers, renderers, game developers and digital artists, with GLB and FBX ready for real-time engines, and cutting files for faceters. A cut library spanning brilliants, jewellery cuts, historic cuts, our own house cuts and the Platonic solids. And the free 3D Gemstone Simulator, where every one of them can be characterised and examined, for you to share your gemstone as an image with its own 3D gemstone report in .pdf.
How we check
Every design is built from its angles, and every file comes from that one construction: STEP, 3DM, STL, OBJ, GLB and FBX for 3D work, and for cutting, the .asc file with its tier CSV and printable diagram.
Then we try to prove it wrong. Each 3D format is opened by a different, independent reader: an industrial CAD kernel (Open CASCADE) for STEP, a separate parser (Assimp) for STL, OBJ, GLB and FBX, and Rhino’s own library for 3DM. Each one measures volume, facet count, closure and dimensions, and they all have to agree. Cutting files are rebuilt the way GemRay reads them and compared against the 3D model. Finally, every stone is ray-traced to measure how it handles light. If anything disagrees, the file doesn’t ship.
Who we are
Clint, our founder, was helping his partner start a jewellery business and wanted to understand diamonds properly, beyond the usual charts and descriptions. He went looking for accurate material and a simulator that could show what the four Cs really look like. When he couldn’t find one, he built it himself.
See it for yourself
Open the simulator, load any cut and see how it handles light. Set the stone exactly the way you like it, then share it with a single link.