Section 14 NATURAL OR CULTURED PEARLS, PRECIOUS OR SEMI-PRECIOUS STONES, PRECIOUS METALS, METALS CLAD WITH PRECIOUS METAL, AND ARTICLES THEREOF; IMITAT ION JEWELLERY; COIN 71 Natural or cultured pearls, precious or semi-precious stones, precious metals, m 71 09 Base metals or silver, clad with gold, not further worked than semi-manufactured 71 09 00 71 09 00 00 Commodity Code Description 71 09 00 00 00 Base metals or silver, clad with gold, not further worked than semi-manufactured.