After immigrating from Germany, Petra Class, a classically trained goldsmith, founded a small jewelry design studio in San Francisco in 1991. 

Since then it has grown into an atelier spanning 2 familial generations across the west coast and, recently, New York City, where a team of gifted metalsmiths create an ever growing collection of sculptural, contemporary jewelry made of high karat gold and precious gemstones.

Petra, accompanied by her son Lucas, are the creative forces behind the studio, while her daughter-in-law Phoebe runs operations and 3 brilliant bench jewelers, Morgan, Clio, and Emma, assist in production.