| 9idgcnr ((CUPRITE included CALCITE)), $10 MINIMUM BID, Petherick Vein, Copper Falls Mine, Keweenaw County, Michigan, 2 x 2 x 1.5 cm, Thumbnail, | |
 | Here is a bright red Calcite from Copper Falls Mine. The color is Cuprite, probably Chalcothrichite, inclusions causing the coloration. |
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