Ask the Experts
April 2014 by Chris RalphFrogs' extinction from fungus
Q: How do metal detectors work around precious metal ore bodies?
Setting up a gravity dredge
• Two questions: Is fool's gold magnetic? And how do you go about filing a miing claim?
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.
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