This U.S. industry comprises establishments primarily engaged in one or more of the following: (1) manufacturing unassembled jewelry parts and stock shop products, such as sheet, wire, and tubing; (2) cutting, slabbing, tumbling, carving, engraving, polishing or faceting precious or semiprecious stones and gems; (3) recutting, repolishing, and setting gem stones; and (4) drilling, sawing, and peeling cultured pearls. Manufacturing synthetic stones--are classified in Industry Miscellaneous Nonmetallic Mineral Product Manufacturing; and Manufacturing costume pearls--are classified in U.S. Industry 339914, Costume Jewelry and Novelty Manufacturing.