[Precious metals and their alloys;] jewelry; [precious stones, namely, diamonds, rubies, sapphires, emeralds, aquamarine, beryl, lapis lazuli, opal, quartz, spinel, topaz, tourmaline, turquoise, onyx, jade, garnet, coral, amethyst, citrine, zircon;] horological and chronometric instruments, namely, [clocks and] watches and parts therefore