Precious metals and their alloys; goods made or coated with precious metals and their alloys, namely, beads for use in the manufacture of jewelry, imitation pearls, imitation precious and semi-precious stones, jewelry chains, pins being jewelry, earrings, earring backs, clasps for use in the manufacture of jewelry, necklaces, brooches, rings and bracelets all being costume jewelry; jewelry; precious stones; and horological and chronometric instruments