Ask the Experts
March 2013 by Chris RalphQ: Where is the best place to prospect for gold in Minnesota?
• Is the Spenceville Wildlife area open to prospecting?
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 was wondering how such a device could locate a rich gold vein in quartz, for example, since a metal like gold is non-magnetic.
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