Quiz:

Gold Quiz: From Nuggets to Flecks

Date: 17 March 2013 Time: 11:29 AM ET
A century ago a lucky gold miner might find a nugget as big as an apple. That gold is gone. Now mines squeeze precious flecks from deposits that look to the naked eye to be just plain old rock.
Test your knowledge of modern gold mining.
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Mercury is used during "artesian" mining operations because gold particles cling to the mercury.
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