Pyrite (iron cross twinned)
Wyoming Mine, Gilman Mining Dist., Eagle Co., Colorado, USA
Thumbnail, 1.9 x 1.8 x 1.7 cm
Ex. Bill & Anne Cook
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An extremely fine Pyrite crystal group showing rare iron-cross twinning from the Wyoming Mine in Colorado. This interpenetrate twin is a brassy, lustrous, sharply formed, loose floater Pyrite group composed of a pair of pyritohedrons. There are even a few, much smaller pyritohedrons that are twinned with respect to the two larger twinned crystals. It is complete all around with no damage or points of attachment.