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Best and Easiest way to refine gold dust to get % purity Finishing. Take 1 kg fine dust in 5 l glass beaker; add l aqua regia (1 part HNO3 3 part HCl) in ....
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Best and Easiest way to refine gold dust to get % purity Finishing. Take 1 kg fine dust in 5 l glass beaker; add l aqua regia (1 part HNO3 3 part HCl) in ....
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