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History. The borax method of gold extraction has been used by artisanal gold miners in the Benguet area north of Manila in the Philippines for more thanyears.

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Economic gold extraction can be achieved from ore grades as little as.g/kg (0.parts per million, ppm) on average in large easily mined deposits.

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The borax method of gold extraction has been used by artisanal gold miners in the Benguet area north of Manila in the Philippines for more thanyears.

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