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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 than 30 years.
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March 2012 ipad ewaste Filipino Borax, Pakistans . He told us that elders in Benguet have been using borax to extract gold since the 1900s. But in the 1960s and 70s ...
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