facetslicer is a browser-based studio for designing gem-faceting diagrams — set every tier angle, index, and depth, watch the stone take shape in a live 3D view, and judge how it will handle light before you touch a piece of rough.
Runs entirely in your browser — nothing to install. Free to start, and your first Diagram Trace is on us.
Design, evaluate, and document a cut — end to end, with no software to install.
Set tier angles, index positions, and depths with a live 3D view of the stone as it takes shape. Symmetry, index gears, and meetpoints handled for you.
A physically-based preview shows how the finished stone returns light — its brilliance, its fire (dispersion), and where it leaks — so you can judge a design before spending rough.
Rock the stone through viewing angles to see how brilliance and fire hold up in real, moving light — not just a single head-on look.
Generate a clean, one-page cutting sheet: indexed facet-by-facet instructions with angle and index columns, square top/side/bottom diagrams, and readable striped rows for the bench.
Import and export standard faceting formats so facetslicer fits alongside the designs and machines you already use.
Design against real gemstone properties — refractive index and dispersion across a wide range of species — so the preview reflects the stone you'll actually cut.
Build the cut tier by tier and watch the gem render live as you go. Adjust angles and indices until the geometry closes cleanly.
Study brilliance, fire, and leakage — and tilt the stone through viewing angles — to know how it will perform before any rough is touched.
Export a clean, one-page cutting diagram with per-facet instructions and reference diagrams, ready to take to the machine.
Have a stack of old faceting diagrams you've meant to digitize — from magazines, club handouts, competition sheets, a mentor's photocopies? Or a stone you cut years ago, printout in the drawer, file long gone? Point Diagram Trace at it: drop in a PDF, scan, or photo and it reads the angles, index settings, and tier structure straight off the page, then rebuilds a full 3D design you can rotate, edit, re-index, and re-cut.
The paper survived, the file didn't. Get it back as a live, editable model.
Decades of printed diagrams, now editable and searchable instead of stuck in a binder.
Bring a hand-drawn or photocopied design into a live CAD model you can refine and re-cut.
See it in 3D, confirm the meets, adjust proportions — and every value shows whether it was measured or estimated, so you always verify before cutting.
Diagram Trace uses AI vision to read your diagram, so it runs on credits — not your subscription. Your first trace is on us.
Describe a change in plain language — “make the crown 2° steeper,” or “why does this leak?” — and Loupe AI edits or critiques your design, grounded in real light-performance numbers. Choose how much depth you want; like Diagram Trace, it runs on credits.
One subscription unlocks the whole studio — live 3D design, light-performance & tilt preview, cutting-sheet export, and both AI tools (Loupe AI and Diagram Trace). AI usage runs on credits you buy as you go, so you only pay for what you actually use. Cancel anytime.
Midwest Faceters Guild member? Your guild membership includes facetslicer access — just log in.
A Loupe AI edit is 1–6 credits by depth; a Diagram Trace read is priced by the work it takes. Your first read is on us.
Coming soon — GemJacket. The rough-stone optimizer — fit the best cut to a piece of rough and maximize your yield — joins the studio soon. Subscribe now at $10/mo and you're locked in: your price stays $10 even when it rises to $12 at launch.
Design it, see how it handles light, and print the sheet — all before you touch the rough.
Launch facetslicer