 Gold extraction with BORAX for small-scale miners 00/00/0000 Learn how to make more gold with borax instead of mercury. Description of a new environmentally beneign gold extraction method which will make use of mercury... Mining : What Is Gold Mining? How Is Gold Mined? The largest producing gold mine in the world, the Grasberg mine in Papua, Indonesia, is primarily a copper mine. Gold ore processing Cyanide process. Cyanide extraction of gold may be used in areas where fine gold-bearing rocks are found. Sodium cyanide solution is mixed with finely ground rock that has been proven to contain gold or silver and 