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June 2014 by Chris Ralph• Can you explain a jig, Ainlay bowl, hammer mill?
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.
Ask The Experts - Is a detector any good at discriminating pyrite or chalcopyrite in ferrous-reject mode?
Were there insufficient values to continue mining at this site?
Q: Tantalite in an African nation -- is it worth pursuing?
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