Geologist Peter Appel and miner Leoncio Onay tells about an alternative to mercury use in small and artisanal gold mining giving a higher yield with gold and avoiding pollution and poisonings with mercury.
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Gold extraction with BORAX for small-scale miners - Rather Rich & Healthy than Poor & Poisoned (09:48)
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Geologist Peter Appel and a miner Leoncio Onay tells about mercury free ...
Geologist Peter Appel and a miner Leoncio Onay tells about mercury free gold mining by the ‘gravity-borax method’.