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Ask The Experts: Nickel assays

Q: Our group has found a nickel deposit in the Yuma, Arizona area that is similar to the one that you wrote about...

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Ask The Experts—Using classifiers


Q: I would like to know how to use a classifier when I dump my gravel into my sluice box. I would also like to know what sizes classifiers come in. I know that they are in sizes like -3/4. What does the “minus” in the size mean? Thanks for any help you can give me.

Ask The Experts - Does silicone rubber make a good sluice mat?


Ask The Experts: Could you expand on your previous blasting article?


Q: Could you write more about the last two methods that you mentioned—the expanding chemical mixtures and the micro blasters, how and when to use them, and when not to use them?

Ask the Experts - proper mining claim procedures


Q: Can you offer any information on proper mining claim procedures?

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Centrifugal bowls versus jigs

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If it's gold, how should I clean it?

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• Is this a good time to invest in gold and silver?

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