0 0 7112.91 Waste and scrap of gold, incl. metal clad with gold, and other waste and scrap containing gold or gold compounds, of a kind used principally for the recovery of precious metal (excl. ash containing gold or gold compounds, waste and scrap of gold melted doown into unworked blocks, ingots, or similar forms, and sweepings and ash containing precious metals) 10 4 3 2