Colonel Ricardo Alberto Suárez Rátiva, the commander of the 3rd Marine Corps Brigade, explained to Diálogo that amateur miners use mercury in their mining process. “To get one gram of gold, the ratio is more or less two grams of mercury, it’s two to one. And a special connotation is that Colombia does not produce mercury.
read more... https://dialogo-americas.com/en/articles/misfortune-gold-colombia
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