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 71 09 00 Base metals or silver, clad with gold, not further worked than semimanufactured. 71 09 00 00 Base metals or silver, clad with gold, not further worked than semimanufactured. Commodity Code Description 71 09 00 00 000 Base metals or silver, clad with gold, not further worked than semimanufactured.