Ask The Experts - Time for small mine exemptions
October 2020 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?
• Sweep speed and sensitivity settings for a GPX-4500
What minerals are magnetic? I have heard that super magnets (rare earth magnets) can capture platinum. True?
Treating ore with a plasma torch or shock waves?
Q: ...Is there any way to process the ore without using mercury or cyanides...?
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