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REFINING-HOW-TO REFINE GOLD WITH AQUA-REGIAhow-to refine gold with aqua-regia ... (1/2 to 2 hours)as a brown/black mud/curd. gold can also be droped with zinc powder, zp weight=expected gold weight next;
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Gold Refining using Aqua Regia, Dislolve goldDissolving Gold in an Aqua Regia Solution is a Gold Refining Process Gold Chloride and other precious metals are easily separated and refined.
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