Ask the Experts
October 2012 by Chris RalphGood questions...from A to Z...
While there is no metal detector that will see only gold, there is a device that can reliably distinguish gold from lead, copper, iron or other metals. It is an X-Ray fluorescence tester, sometimes called an XRF gun.
Q: I would like to know where I can find information on the Abby mine located at Hildreth, CA.
Q: What I would like to know is how to confirm if it is magnesite and the quality.
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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