The Lost Wax Technique

How one of jewelry making’s oldest techniques transforms a model into precious metal.

Lost-wax casting has been used to create objects in metal for thousands of years and remains an important technique in fine jewelry today.

The principle is remarkably simple: a model of the jewel is created in wax or another castable material, a mold is formed around it, and the model is removed through heat. Molten metal then fills the space it leaves behind.

What begins as a model becomes a jewel in gold.

An Ancient Technique Still in Use

Evidence of lost-wax casting can be found in ancient cultures across different parts of the world. Over centuries, goldsmiths and metalworkers refined the process and adapted it to increasingly complex forms.

The fundamental principle has endured because it offers something extremely useful to a jewelry maker: the ability to translate three-dimensional forms, fine details, textures, and complex shapes into precious metal.

Today, traditional knowledge and modern technology often work together. A model may be formed directly in wax by hand, produced from a mold, or developed using digital design and casting technology.

The tools have evolved. The goldsmith’s understanding of casting, metal, construction, and finishing remains essential.

How Lost-Wax Casting Works

The exact process varies according to the workshop and the piece being made, but the essential stages remain similar.

The Model

The process begins with a three-dimensional model representing the jewel to be cast.

Traditionally, this may be carved or shaped in wax by hand. Contemporary workshops may also use molds or digitally created models, depending on the design and production method. The quality and precision of this model are important because its form will ultimately be reproduced in metal.

Investment

The model is connected to a channel, known as a sprue, through which the molten metal will eventually flow. One or more models may be assembled onto what is commonly called a casting tree and placed inside a flask. A specialized investment material is poured around them and allowed to harden.

Burnout

The flask is heated according to a controlled cycle. The wax or other castable material is removed, leaving behind a cavity in the investment that reproduces the shape of the original model. This is the “lost wax” that gives the technique its name.

Casting

Molten metal is introduced into the cavity left by the model. For Via Orefici jewelry, this may be 18K gold, depending on the piece. Temperature, metal preparation, casting conditions, and the design of the channels through which the metal travels all affect the quality of the result. Casting therefore requires much more than simply pouring metal into a mold.

From Casting to Jewel

When the metal has cooled, the investment is removed and the individual castings are separated from the casting tree. At this stage, what emerges is not yet the finished jewel. The raw casting must be cleaned and carefully worked. Depending on the design, the goldsmith may file, assemble, solder, refine surfaces, add texture, polish, and prepare the piece for stone setting or other finishing work.

This stage is particularly important. Casting creates the basic metal form; skilled goldsmith work turns that casting into a finished piece of fine jewelry.

Why Goldsmiths Use Lost-Wax Casting

Lost-wax casting allows jewelry makers to create forms that would be difficult or inefficient to produce through forming and fabrication alone.

It is particularly useful for sculptural shapes, complex volumes, detailed surfaces, and designs in which several elements need to become part of a unified form.

But the technique itself does not determine the quality of a jewel.

The original design, the quality of the model, control of the casting process, the metal, and—critically—the work performed after casting all contribute to the finished piece.

This is an important distinction. Lost-wax casting is a method. Craftsmanship is the knowledge required to use that method well.

Lost-Wax Casting at Via Orefici

Lost-wax casting is one of the techniques used to create pieces within the Via Orefici collection.

We value it not simply because it is an old technique, but because of what it allows a skilled goldsmith to achieve with form, texture, volume, and detail.

Like many techniques found in the Italian bottega orafa—the traditional goldsmith workshop—it connects accumulated knowledge with contemporary jewelry making.

The result is what ultimately matters: a beautifully made jewel, where design, material, technique, and skilled hands have come together successfully.

In Italy, beauty belongs in everyday life.