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 02 Diamonds, whether or not worked, but not mounted or set 71 02 31 Unworked or simply sawn, cleaved or bruted Commodity Code Description 71 02 31 00 Unworked or simply sawn, cleaved or bruted