Derco Fine Jewelers is committed to providing excellent quality diamonds and jewelry at exceptional prices, with a dedication to service unsurpassed in the industry. Our strong customer support is a reflection of our dedicated staff of professional gemologists, goldsmiths and jewelers, many of whom have worked with us since our showroom opened in San Francisco over 30 years ago. Reflecting the diversity of our customers throughout the greater San Francisco Bay Area, our staff is able to serve our customers in a variety of languages. .