Gemgen - Parametric Gem Mesh Generator

Kengo Ito in Presets

What is Gemgen

Create beautiful, jeweler-accurate gemstone meshes in seconds — no modeling required.

Gemgen is a fully parametric gem generator for Blender. Choose a cut type, adjust parameters in real time, and get render-ready geometry instantly.

Editions at a Glance

Gemgen Lite Gemgen (Full)
Cut types Round only All 10 cuts
Parametric editing Yes Yes
Viewport gizmos Yes Yes
Set Good Proportions Yes — tuned for Round Yes — per cut type
Sample scene (.blend) — Included
Best for Round-only workflows, trying the tool Full jewelry pipelines, maximum variety

10 Cut Types (Full edition)

Round, Cushion, Emerald, Oval, Pear, Marquise, Heart, Trillion, Baguette, and Rose — each with optimized default proportions aligned with real-world gemstone standards.

Lite includes Round only; the other nine require the Full edition.

Key Features

  • Real-time mesh updates as you edit parameters
  • Interactive viewport gizmos for visual size and proportion editing
  • Set Good Proportions — one-click reset to jeweler-standard ratios
  • N-gon topology option for cleaner mesh output
  • All parameters are animatable
  • Sample scene included (Full edition) — open and render right away

Perfect For

  • Jewelry designers creating product visualizations
  • 3D artists adding realistic gems to scenes
  • Game developers building gem assets
  • Motion graphics artists animating gem parameters
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parametric gem jewelry gemgen gemstone Generator

  • Round cut only — all other cuts require the full edition.

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Details
Blender Extension Compatible Yes
Sales 50+
Dev Fund Contributor
Published 6 months ago
Blender Version 4.2 - 5.0
Extension Type Add-on
Render Engine Used Cycles
License GPL

Kengo Ito

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