Ask The Experts
Ask The Experts: Could you expand on your previous blasting article?
January 2017 by Chris Ralph
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?
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Sulfides and oxides—what's the difference between the two?
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Ask The Experts: What is a Spanish needle?
Some fellow in Texas was selling a Spanish needle—a dousing device used to recover minerals in the old days. Do you know anything about these?
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Bismuth oxide for assaying?
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Estimating the gold content of ores with gold, quartz and other minerals?
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