Ask The Experts: How do I identify gold in hard rock that may be mixed with other metals?

September 2016 by Chris Ralph

Q: Aside from the softness scratch test and other methods of identification, what feedback would you have on identifying gold in hard rock that may be mixed with other metals that affect its color?

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Some ores—mostly those with a high free gold content—are very amenable to gravity concentration. Well oxidized ores containing coarse gold are usually best for non-cyanide processes. Ores with significant sulfide content may require the...

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...if you have a good, rich spot, hand-operated systems can produce some decent gold.

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