Originally Posted by
bighit
Mercury was used in gold mining and still is in some countries.
Quote
In mines, mercury is used to recover minute pieces of gold that is mixed in soil and sediments. Mercury and gold settle and combine together to form an amalgam. Gold is then extracted by vaporizing the mercury. ... Prolonged and high exposure to mercury by inhalation damages the nervous, digestive, and immune systems.
Cyanide is also used in gold mining, particularly useful in heap leach operation for dissolving gold out of otherwise low grade ore that could not achieve viable recovery by other methods.
People who have been there focus on the fundamentals. People who sit at keyboards all day focus on the trivial and inane.