Ask The Experts
Ask The Experts - Time for small mine exemptions
October 2020 by Chris Ralph
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?
Ask the Experts
• Sweep speed and sensitivity settings for a GPX-4500
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
Treating ore with a plasma torch or shock waves?
Ask The Experts - How do I recover gold in pyrite?
Ask the Experts - Processing sulfide ore without mercury or cyanide.
Q: ...Is there any way to process the ore without using mercury or cyanides...?
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