339911  Jewelry (except Costume) Manufacturing

This U.S. industry comprises establishments primarily engaged in one or
more of the following: (1) manufacturing, engraving, chasing, or
etching precious metal solid or precious metal clad jewelry; (2)
manufacturing, engraving, chasing, or etching personal goods (i.e.,
small articles carried on or about the person, such as compacts or
cigarette cases) made of precious solid or clad metal; and (3) stamping
coins.

The data published with NAICS code 339911 include the following
SIC industries:

3479 Metal coating and allied services (pt)                                    
3911 Jewelry, precious metal