448310 Jewelry Stores This U.S. industry comprises establishments primarily engaged in retailing one or more of the following items: (1) new jewelry (except costume jewelry); (2) new sterling and plated silverware; and (3) new watches and clocks. Also included are establishments retailing these new products in combination with lapidary work and/or repair services. The data published with NAICS code 448310 are comprised of the following SIC industry: 5944 Jewelry stores