| Tariff Classification |
| section 14 | 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 |
| 71.15 | Other articles of precious metal or of metal clad with precious metal: |
| 7115.10 | －Catalysts in the form of wire cloth or grill, of platinum |
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