What is GemDiagram
GemDiagram is a browser-based faceting design studio. Open a gemstone cut, preview it live in 3D, trace light through it, and estimate yield — no install, no build, no account required.
Try it free
- Open the Developer.
- Browse the pre-loaded gems and switch between Solid and Realistic render.
- Fire a few rays in Ray Studio to see how light moves through the stone.
Ready to design your own cut, edit a diagram, or export a PDF? See Accounts, Plans & Billing for what each plan unlocks, then the faceting workflow for the concepts behind angle, the index wheel, and cut distance.
When you sign in on a paid plan, a short guided tour runs the first time you open the editor, spotlighting the tools your plan just unlocked. It picks up where it left off if the tour spans more than one page, and steps through only the features new to your tier.
Coming from another faceting tool? GemDiagram imports your existing designs — see GemDiagram vs GemCAD or GemDiagram vs Gem Cut Studio.