7108 12 �000: Unworked gold or silver (only refined gold or silver in the form of ingots, plates, powder and granules, and gold used for coinage); 7108 12 �000 9: unworked precious metals (excluding refined precious metals in the form of ingots, plates, powder and granules). Within code 7108: Unworked precious metals (only unique and non-refinable nuggets). Within code 7108: Unworked precious metals (only unique and non-refinable nuggets).