Jewelry File Format Specification
3DM Jewelry Files & Editable Rhino NURBS Models
Download 3DM jewelry files for Rhino 3D & MatrixGold. Edit-ready NURBS source models with pre-set stone seats, prongs, and finger sizing.
Understanding 3DM (Rhino NURBS) in Jewelry Manufacturing
.3DM is the native file format of Rhinoceros 3D, recognized worldwide as the gold standard format for technical jewelry CAD design. Unlike polygonal mesh formats, 3DM files store mathematical NURBS surfaces, curves, and history trees.
This means you can open any 3DM file from our library and freely adjust ring finger sizes, modify prong heights, tweak channel wall thicknesses, or swap diamond cuts without loss of geometric precision.
Technical File Specifications
- Format: OpenNURBS .3DM (Rhino 5+ compatible)
- Geometry: Mathematical NURBS Surfaces & Polysurfaces
- Layer Organization: Color-coded layers (Stones, Prongs, Shank, Cutters)
- Precision: Engineering tolerances to 0.01 mm
Manufacturing & Printing Applications
- Direct editing in Rhino 3D, MatrixGold, 3D-CAD, or CounterSketch
- Extracting curves for CNC milling or laser engraving
- Generating custom client render previews with V-Ray or KeyShot
- Exporting custom scaled STL files for 3D wax printing
Sample CAD Models Available in 3DM (Rhino NURBS)
3DM (Rhino NURBS) Frequently Asked Questions
What is a .3DM file in jewelry design?
.3DM is a 3D CAD file format created by Rhino 3D that stores mathematical NURBS surfaces. It allows jewelers to edit ring sizes, stone layouts, and prong settings with exact precision.
Can I convert a 3DM file to STL for 3D printing?
Yes. In Rhino or MatrixGold, you can export any 3DM model as an STL mesh file. (Note: every download in our library already includes pre-exported watertight STL files).
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