Gemgen for Blender
Create jeweler-accurate gemstone meshes in seconds — no modeling required.
Current version: 1.1.1
Compatible with Blender 4.0+
Gemgen is a fully parametric gem mesh generator for Blender. Choose from 10 cut types, adjust proportions with interactive viewport gizmos, and get render-ready geometry instantly — no manual modeling required.
Originally ported from the Cinema 4D Gemgen plugin, this Blender edition brings the same jeweler-standard defaults and one-click "Set Good Proportions" workflow to Blender artists, jewelry designers, and game developers.
Main features
- 10 Cut Types: Round, Cushion, Emerald, Oval, Pear, Marquise, Heart, Trillion, Baguette, and Rose — each with optimized default proportions aligned with real-world gemstone standards.
- Real-Time Parametric Editing: adjust crown, pavilion, table, and more — the mesh updates live as you change parameters in the N-panel or Object Properties.
- Interactive Viewport Gizmos: drag arrow handles to visually adjust size, table height, and pavilion depth directly in the 3D viewport.
- Set Good Proportions: one-click reset to jeweler-standard ratios for the current cut type.
Additional tools
- Animatable Parameters: all gem properties are keyframeable for motion graphics workflows.
- N-gon Topology: optional N-gon merge for cleaner mesh output.
- Sample Scene: the Full edition includes a ready-to-render .blend file with pre-configured gems, materials, and lighting.
Compatibility
- Blender 4.0 or later (developed and tested on Blender 5.0)
Documentation
InstallationDownload and set up the plugin.QuickstartGet up and running in minutes.Cut TypesAll available gemstone cut shapes.ParametersFull parameter reference.ToolsTimeline utilities and operators.LimitationsKnown constraints and workarounds.FAQFrequently asked questions.ChangelogVersion history and release notes.All docs →