Blender for jewellery design: JewelCraft, setup, and where it falls short

Short answer: yes, you can design jewellery in Blender, and with the free JewelCraft add-on it has real jewellery tools: gems, prongs, cutters, gem spacing, weight estimates and gem maps. It is excellent for renders, organic forms and learning on no budget, and its licence allows commercial work. Its limits are precision and portability: Blender models in meshes rather than exact surfaces and cannot export STEP, so a file someone else must edit later is better built in Rhino.

Versions here are current as of 22 October 2026: Blender 5.2 LTS and JewelCraft 3.0.1.

What Blender does well for jewellery

• Rendering. Blender ships with Cycles, a path tracer for photorealistic images, and EEVEE for real-time previews, which is plenty for customer approval images.
• Organic and sculpted forms, which are slow to build from exact surfaces.
• Cost. It is free and open source, for any purpose, including commercial work.
• Platforms. It runs on Windows, Linux and Apple silicon Macs.

What does JewelCraft add?

JewelCraft is a free add-on by Mikhail Rachinskiy, released under GPL-3.0 or later. It turns Blender into a usable jewellery modeller:

• Gems, with cutters to make their seats.
• Prongs, including automatic prongs since version 3.
• Spacing between gems, now with a constraint that holds it while you edit.
• A component library.
• Weight estimates in precious alloys.
• Colour-coded gem maps for the setter.

JewelCraft 3 needs Blender 4.5 or later. For Blender 4.2 up to 5.1, version 2.18.1 is still offered.

How do you install JewelCraft?

JewelCraft is not on Blender's official extensions site. Its author distributes it from his own extension repository:

• Open the JewelCraft page on GitHub (github.com/mrachinskiy/jewelcraft) and find the download link for your Blender version.
• Drag that link into the Blender window. Blender adds the author's repository and installs the extension from it.

Set up units before you model

Jewellery is measured in millimetres, and a model built at the wrong scale prints at the wrong size without any warning. In Properties ‣ Scene ‣ Units, set the unit system to metric and the length to millimetres.

Two things to know. Unit Scale changes only how values are displayed, not the geometry itself. And the STL exporter has its own Scale and Scene Unit options. Whatever you choose, open the exported file in your slicer and check that a ring you modelled at 17mm inside diameter still measures 17mm before you print it.

Check the model with 3D Print Toolbox

3D Print Toolbox, a free extension maintained by JewelCraft's author, checks a mesh for the faults that stop a print, such as non-manifold geometry, self-intersections and walls thinner than a value you set, and it reports the model's volume. Volume is the number you need to estimate metal weight.

Since Blender 4.2 it no longer ships with Blender; install it from Blender's extensions platform.

Exporting for printing and casting

Export STL from Blender's File menu. That is what most printers and casting bureaus want. What Blender cannot do is export STEP: its built-in formats are meshes and scene formats, and the third-party STEP add-ons only import. If a manufacturer or another designer will need to edit your model as exact geometry, Blender cannot give them that file. STL, STEP or OBJ explains why it matters.

Where does Blender fall short for jewellery?

• Precision. A mesh approximates curves with flat faces, and Blender has no exact NURBS solids, so tight tolerances such as a calibrated pavé field or a fitted band are harder to hold.
• Editability. Without STEP, the file you hand over is a mesh, and resizing or reworking it means going back to the original Blender file.
• Workflow. Blender was built for animation and visual effects, so much of its interface has nothing to do with jewellery.
• Intel Macs. From Blender 5 the Mac version runs on Apple silicon only, so an Intel Mac stays on Blender 4.5, which JewelCraft 3 still supports.

Who is Blender right for?

• Students and makers learning jewellery CAD on no budget.
• Designers who sculpt organic pieces and want a free renderer.
• Small brands producing their own images and simple pieces for direct printing.
• Not the right tool for production files that need STEP, or tight-tolerance stone work at volume.

For other free tools, see free jewellery CAD software; for the paid ones, the full software comparison. If you would rather have the production model made, outsourcing your jewellery CAD delivers STL, with STEP where the model must stay editable.