Native Copper, Caledonia Mine | |||
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Native Copper, Caledonia Mine. This is a heavy lump of naturally occurring copper from the Caledonia Mine, Ontonagon County, Michigan. Like several of the dozen samples I got from the same source, this one has what look like impressions of pebbles, as it was compressed around them at some point in its history. Source: Larry Curtis Contributor: Theodore Gray Acquired: 10 June, 2003 Price: $2.50 Size: 2" Composition: Cu | |||
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