Palladium Fine Jewelry is a store that has been on Main Street in St. Helena since 1998. It showcases several brands in designer jewelry and timepieces, including names like Kwiat and Hermes. It is best known for its own designs and collections, however, which are created at its own studio and feature handmade platinum and diamond engagement rings. The store is staffed by GIA-trained designers, gemologists, jewelers and appraisers.