Gold Ore Processing
In placer mines, the gold is recovered by gravity separation. For hard rock mining, other methods are usually used.
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Famous quotes containing the word gold:
“As in digging for precious metals in the mines, much earthy rubbish has first to be troublesomely handled and thrown out; so, in digging in one’s soul for the fine gold of genius, much dullness and common-place is first brought to light.”
—Herman Melville (1819–1891)