Turning a jewelry idea into a finished piece of gold or silver almost always comes down to one time-tested process: lost-wax casting. It is the backbone of modern jewelry manufacturing, and at our Los Angeles studio it is where custom rings, pendants, and heirloom pieces come to life. What has changed in recent years is how the wax pattern gets made. Instead of carving wax by hand, we design the piece in CAD and 3D print a flawless castable pattern. In this guide we walk through what lost-wax casting is, how CAD and 3D printing fit into it, and why the combination gives you a sharper, more repeatable result.

What Is Lost-Wax Casting?

Lost-wax casting is a method of creating a metal object from a wax model. The name comes from the key step: the wax is melted away and “lost,” leaving behind a hollow cavity that gets filled with molten metal. The technique is thousands of years old, but the fundamentals have not changed. You start with an exact wax replica of the piece you want, encase it in a heat-resistant material, burn out the wax, and pour metal into the void it leaves behind.

The process runs through a predictable sequence. First, a wax pattern of the jewelry is produced. That pattern is attached to a wax “sprue” and placed in a flask, which is then filled with a plaster-like investment material. Once the investment hardens, the flask goes into a kiln where the wax burns out completely. Molten gold, silver, platinum, or another alloy is then cast into the empty mold using gravity, vacuum, or centrifugal force. After the metal cools, the investment is broken away and the raw casting is cleaned, filed, and polished into a finished piece.

Where CAD and 3D Printing Come In

The oldest part of this process is the wax pattern, and it is also where technology has made the biggest difference. Traditionally, a jeweler hand-carved each wax model, which took skill and time and made two identical pieces nearly impossible. Today we build the design in jewelry CAD software, giving us precise control over dimensions, stone settings, prong placement, wall thickness, and metal weight before anything physical exists.

Once the digital model is approved, we 3D print it in a castable resin or wax that is engineered to burn out cleanly in the kiln. This printed pattern drops straight into the lost-wax casting workflow in place of a hand-carved one. The payoff is real: crisp detail, tight tolerances, consistent results, and the ability to reproduce the exact same piece again or resize it with a few clicks. It also lets you review and tweak a design on screen, or hold a printed sample in hand, before committing to precious metal. You can read more on our jewelry services page.

Why the Digital Workflow Matters for Custom Jewelry

For anyone commissioning a custom piece, the CAD-plus-casting approach removes a lot of guesswork. Because the model is built to exact measurements, ring sizes and gemstone seats are dialed in from the start. Because the pattern is printed rather than carved, the finished casting matches the design closely and can be recreated for a matching set, a repair, or a future order. And because you can approve the design digitally, there are fewer surprises when the metal comes out of the flask.

The technology does not replace craftsmanship; it supports it. Casting still requires an experienced hand to sprue the pattern correctly, choose the right investment and burnout schedule, control metal temperature, and finish the piece by hand. The best results come from pairing precise digital design with skilled casting and finishing, which is exactly how we approach every job.

Materials and What to Expect

Lost-wax casting works with a wide range of metals, including yellow, white, and rose gold in various karats, sterling silver, platinum, and palladium. Turnaround depends on the complexity of the design, whether stones are being set, and the finishing required, but a typical custom piece moves from CAD design to printed pattern to cast metal to final polish over a matter of days once the design is locked. General pricing varies with metal weight, alloy, and labor, so the clearest path is to share your concept and let us quote it.

Ready to Cast Your Design?

Whether you are starting from a rough sketch, a photo, or a piece you want recreated, our Glendale and Los Angeles studio can take it from CAD design through 3D-printed wax and into finished cast metal. If you are exploring a custom ring, pendant, or a small production run, reach out to eCadCam for a quote and we will help you plan the right approach for your piece.