Ask The Experts
Ask The Experts: What is a Spanish needle?
July 2017 by Chris Ralph
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?
Ask The Experts—What minerals are magnetic? Can rare earth magnets capture platinum?
What minerals are magnetic? I have heard that super magnets (rare earth magnets) can capture platinum. True?
Ask the Experts
Dust and dry washing
Ask the Experts
Why are there no maps of the so-called mining districts?
Ask the Experts
Gold out of auqa regia
Ask the Experts
Marketing other minerals recovered while gold mining
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