Camilla Dietz Bergeron and Gus Davis have spent nearly three decades building a niche business that buys and sells antique, period, and estate jewelry, including pieces by masters such as Cartier, Van Cleef & Arpels, Flato, Schlumberger, Verdura, and David Webb. The firm specializes in late 19th century and 20th century jewelry, with emphasis on Edwardian, Art Deco, and retro pieces. Says Bergeron, “I love to search for that one-of-a-kind piece—the pearl in the oyster.”