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Native Copper, Caledonia Mine
An example of the element Copper

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Copper Native Copper, Caledonia Mine
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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