Petra Class & Lucas Class-Knorr

Petra Class Studio is a family-owned atelier based in San Francisco, CA that specializes in 22k and 18k recycled gold and precious gemstones – designed to emphasize color, texture, and the playful combinations of cut and rough stones. The studio uses age-old techniques of gold smithing and hand forging, stretching the boundaries of conventional jewelry design. Originally trained as a silversmith in Germany and having spent several years constructing tableware, Petra’s approach to jewelry making has been informed foremost by the European tradition of applied art. Since the studio’s founding in California, where Petra immigrated to in 1991, it has grown into a robust atelier with gallery representation across the US. Petra, accompanied by her son Lucas, are the creative forces behind the studio, while her daughter-in-law Phoebe runs operations and several brilliant bench jewelers assist in production.