Section 14 Natural or cultured pearls, precious or semi-precious stones, precious metals, metals clad with precious metal and articles thereof; imitation jewellery; coin 71 Natural or cultured pearls, precious or semi-precious stones, precious met Jewellery; Co 71 09 Base metals or silver, clad with gold, not further worked than semi-manufactured Commodity Code Description 71 09 00 Base metals or silver, clad with gold, not further worked than semi-manufactured.