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is there a kind of metal detector that can detect metallic clays & sands ?
e.g. "flour gold" - where the gold particles are tiny, .001 inches for example.
All the detectors seem oriented to finding coins etc.
I'd be happy to find metallic gold on a piece of quartz etc ... or a skull with gold fillings ... but mostly I'd like to find deposits of black sand, flour gold, etc.
Most decent detectors will pick up gold like that if it is in high enough concentration.
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