Hi Product Hunt! I m Suva, the maker of Facet 96 the project is called OpenGemCutting on GitHub.

The idea is simple: turn a gemstone concept into a design you can actually inspect and edit, not just a beautiful image.

Facet 96 is an open-source gemstone faceting workbench that runs in your browser. You can adjust cutting angles and symmetry, inspect the geometry in 3D and multiple views, compare designs with optical previews, and follow the cutting sequence with a step-by-step assistant.