A teenage boy places some sand mixed with gold and some mercury onto a large, shallow, wooden plate then kneads the mixture with his hands.
He adds some water, and repeatedly sifts out the unwanted sand and waste, leaving behind a shiny alloy of gold and mercury in the center of the plate. "If you heat this up, you get high-grade gold," the 15-year-old boy, Reynan Broso, explains.
read more... https://mainichi.jp/english/articles/20171006/p2a/00m/0na/023000c
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