| COPPER, Keweenaw Peninsula, Michigan, 6 x 6 x 2.5 cm | |
 | Interesting copper with a secondary blue mineral as a coating on some of the matrix from the Gil Griffin collection. |
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| COPPER, Keweenaw Peninsula, Michigan, 6 x 6 x 2.5 cm | |
| Interesting copper with a secondary blue mineral as a coating on some of the matrix from the Gil Griffin collection. |
|