Ask The Experts
Ask The Experts—Inconsistent fire assays
November 2011 by Chris Ralph
Q: ...He consistently comes up with values much higher on the same ore samples.The Portable XRF Gun
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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