gold containing rocks are ground and afterwards pulverised into small pieces
and the material thus obtained is mixed with elemental mercury to form an amalgam
out of gold and mercury. After gathering this gold-amalgam it is further processed
by smelting, so that the mercury vaporizes and the gold remains behind.
read more... https://www.modernghana.com/news/1237260/open-letter-to-the-asantehene
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