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Gold extraction refers to the processes required to extract gold from its ores. This may require a Hard rock ores have formed the basis of the majority of commercial gold recovery operations since the middle of the I Podleska and T Green - goldavenue Archived 2002-04-01 at the Wayback Machine Retrieved 2012-07-01
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Removing the gold-bearing rock from the ground is just the first step. To isolate pure gold, mining companies use a complex extraction process. At a mill, large machines known as crushers reduce the ore to pieces no larger than road gravel.
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