... > SECTION XIV - NATURAL OR CULTURED PEARLS, PRECIOUS OR SEMI-PRECIOUS STONES, PRECIOUS METALS, METALS CLAD WITH PRECIOUS METAL, AND ARTICLES THEREOF; IMITATION JEWELLERY; COIN > CHAPTER 71 - NATURAL OR CULTURED PEARLS, PRECIOUS OR SEMI-PRECIOUS STONES, PRECIOUS METALS, METALS CLAD WITH PRECIOUS METAL, AND ARTICLES THEREOF; IMITATION JEWELLERY; COIN > I. NATURAL OR CULTURED PEARLS AND PRECIOUS OR SEMI-PRECIOUS STONES > 7102 Diamonds, whether or not worked, but not mounted or set > Industrial > Unworked or simply sawn, cleaved or bruted