What kind of CAD software is used for custom ring design?

Short answer: MatrixGold. If you're in a custom shop and the designer isn't on MatrixGold or its predecessor RhinoGold, they're on an older version of the same thing. Long answer: there are about four programs that actually matter in this trade, and the rest is marketing hype.

MatrixGold dominates for a reason. It's built inside Rhino 7, which is the industry-standard NURBS modeler for anything that needs precise curves - a ring shank, a basket, a cathedral shoulder. MatrixGold adds a jewelry-specific layer on top: parametric ring blanks, stone libraries with actual GIA proportions, pre-built head and shank templates, and a rendering engine that doesn't make your stone look like a piece of frosted glass. About 80% of the CAD files I see coming from other shops are MatrixGold files.

But here's the thing nobody tells you in the "what CAD software should I learn?" blog posts: the tool matters less than the person holding the stylus. I've seen beautiful work come out of a free program called Blender with a jewelry plug-in. I've seen garbage come out of $8,000 worth of MatrixGold. A good CAD designer understands how metal moves during casting, how a prong needs to be angled to actually hold a stone, and how to leave enough stock for a setter to work - none of which the software teaches.

The main players, for what it's worth

MatrixGold (Rhino + plugin)

This is the 800-pound gorilla. $6,000-$8,000 for the full package. Learning curve is steep, but if you're serious about custom jewelry design as a career, this is where you land. Most casting houses accept MatrixGold files directly. The parametric features - change a stone size and the entire ring updates - save hours on revisions.

RhinoGold (discontinued but still alive)

MatrixGold's predecessor. Some old-school shops still run it. It works fine. Don't buy a new license for it because the upgrade path to MatrixGold is dead, but if you inherit a shop with it, you'll get the job done.

Gemvision Matrix (the original)

The granddaddy. Clunky interface by modern standards. If your designer is over 50 and still uses this, they know exactly what they're doing and they will not be convinced otherwise.

Blender + jewelry plug-ins (JewelCraft, Jojak)

Free. Powerful. Horrible user interface. The people who love Blender really love it, and they will tell you at length why it's better. For custom ring design, it's perfectly capable - I've seen a client's wax model come from a Blender file that was cleaner than some MatrixGold work. The limitation is that Blender isn't built for the jewelry workflow the way MatrixGold is. No parametric stone changes. No pre-built component libraries. You're building everything from scratch, which is fine for one-off artistic pieces but slow for production.

Fusion 360 (Autodesk)

I see this mostly from engineers who decide to design an engagement ring. It's excellent for mechanical precision - if you need a hinge or a clasp, this is your tool. For organic, curving jewelry forms? It fights you. I've never seen a professional bench jeweler use Fusion 360 for rings.

3Design

French software. Beautiful organic sculpting tools. A minority player in the US but widely used in Europe. The learning curve is different - less parametric, more freeform. If you want a ring that looks like a flower petal was folded into metal, 3Design might be the right call.

The honest question you should ask your jeweler

Don't ask "What CAD software do you use?" You'll get a brand name and a confident nod. Ask something better: "Can I see the CAD file before you cast it?" and "How many revisions do I get?"

A good CAD designer will show you a rendered image that looks nearly like the finished ring. They'll also show you the wireframe view - the grey, unrendered mesh - so you can see if the shank is too thin or the prongs are asymmetrical. If they refuse to show the wireframe, that's a red flag. The render hides the flaws. The wireframe doesn't.

Last year a client named Priya came in with a CAD file from an online shop. The render was gorgeous. The wireframe showed a shank that tapered from 2.2mm at the shoulders to 1.4mm at the bottom - too thin to be resized, too thin to survive daily wear for five years. The software wasn't the problem. The designer was.

So the answer to your question is MatrixGold, mostly. But the real answer is the person behind it.