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grinding gold bearing quartz rocks

Extractinggoldfromrock- OpenLearn - Open University 27 Feb 2007 ... Information on how to extractgoldfromrock, one of the scientists' ... The home of free learning .... We want puregold, butgold-bearing rocksinclude lots of other materials such asquartz, calcite and the sulfides of other metals. ...It theory at least all we needed to do was grind the cinnabar to a fine powder,

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