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Rare Earth Magnet For Separating Black Sand From Gold

it appears none of the gold prospectors spend nor time or money on assaying their black sands for gold value determination.Instead, they use a rare earth magnet to tells them what is in there and see that most of the gold is magnetite with sometimes hematite.What little remains goes under the microscope where i see that it is a mix of wolframite, scheelite and zircon.

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