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Posted in response to copper ore from Gary Hinkle on August 14, 2010 at 13:41:04:

Re: copper ore

If your rock is the typical copper metal filling the spaces between rock chunks, heat the rock in a fire and drop it in cold water. The rocks will shatter and can be picked out. This does not hurt the copper.

From MikeR - August 17, 2010 at 08:12:25
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