The present invention relates to chemical gold mining in the sense that gold is and which is relatively expensive. PATENTS 3,357,786 12/1967
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Hesperian Health Guides Chemicals Used in Mining. Cyanide is often spilled into waterways during gold mining, and when ponds filled with mine wastes burst and spill.
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The Chemical Abstracts Service registry number is a unique identifier of a particular chemical, Such was the demand that by 2000 BC the Egyptians began mining gold.
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Gold, whose chemical symbol is Au Previous techniques made such extraction difficult and expensive, Gold Mining in the Nineteen Nineties: