Lost Wax Casting: The Art of Creating Jewelry with Precision and Detail Lost wax casting is the process of creating objects, such as casting jewelry, from simple to complex, in a variety of metals like bronze, brass, silver, 925 sterling silver, or gold, by casting an original model or pattern. Lost wax casting is perhaps one of the oldest known metal-forming techniques. Dating back to about 6,000 years, it is still a widely used technique employed in the production of jewelry, and in fields such as dentistry and art.