What is CAD (computer-aided design) for custom rings?

CAD stands for computer-aided design. In the context of a custom ring, it's the step where a designer builds a 3D model of your ring on a screen, using software that was written specifically for jewelry - think Rhino 3D with the Grasshopper plugin, or MatrixGold, or an older program called JewelCAD. The model isn't a rendering for a sales presentation. It's a blueprint for a machine to carve a wax or resin version, which then gets cast into metal.

I use CAD probably 80 percent of the time now. That's a change from ten years ago, when I hand-fabricated most things from sheet and wire. The reason is precision. When I'm building a band that has to fit flush against a center stone, or a pavé setting where every bead has to sit at the exact same angle, CAD gets me there faster and with fewer do-overs than cutting wax by hand. That's not a knock on hand-fabrication - I still do it for certain pieces, especially one-off designs with organic curves or heavy texture. But CAD is the right tool for a lot of the work that comes across my bench.

How it actually works in my studio

The process is pretty standard. After a consultation - usually an hour or two, where I measure the client's finger, look at reference images, and figure out what they actually want versus what they think they want - I sit down at the computer. I build the ring in a 3D space. I set a diamond into the digital head, rotate it, check the angles. I'll often print a wax model right away and test-fit it on a ring sizer. That wax model is the single most useful physical object in the process. Clients can hold it, put it on, see the profile from every angle. That's when the real decisions happen.

I had a client named Priya last year who came in wanting a cathedral setting for a 1.3 carat oval. She'd seen one on Pinterest. I built it in CAD, printed the wax, and she held it and said the shoulders were too high - caught on her sweater. So I lowered them in the model, reprinted, and she signed off. That back-and-forth is exactly what CAD is for. Without it, you'd be paying for a casting that might be wrong, and you'd be doing it twice.

What CAD can't do

It's worth saying what CAD doesn't replace. It doesn't replace the hand-finishing. A ring comes out of casting looking like a matte gray plastic model of itself. The prongs need tightening, the surface needs polishing, the stone needs to be set properly. That's all bench work. CAD also can't make a judgement call about whether a band width actually feels stable on a finger - I've seen models that look beautiful on the screen but collapse under the weight of a large center stone. That's where the jeweler's experience comes in.

Another thing: CAD models often look too perfect. The renderings have that unreal, glossy quality that makes people expect a ring that doesn't tarnish or scratch or catch on things. I tell every client that the wax model is the truth. The screen is not.

How long it takes

Modeling a simple solitaire - a band, a head, a stone - takes me about two hours. A more complex design, like a full-etched filigree band with a hidden halo, can take a full day. Then there's printing, which runs a couple of hours for a single wax. A lot of jewelers outsource the printing to a service bureau, which adds a day or two. I have my own printer - a small resin machine that sits on a shelf next to my bench - so I can print overnight and have a model on the client's finger the next morning.

The real question people have

Most clients ask whether CAD means the ring is "made by a machine." The answer is no. The machine cuts the wax or resin. The human does everything that matters - the design, the metal choice, the stone selection, the setting, the finishing. CAD is a tool, like a jeweler's saw or a torch. It doesn't make the decisions. It makes the decisions easier to execute.

If you're commissioning a custom ring and the jeweler shows you a CAD model on a laptop, that's a good sign. It means you'll get to see and feel what you're buying before any metal is melted. That's the whole point.