Description: Chalcopyrite ep Tetrahedrite unknown locality in China 6.5 x 5.3 x 3.3 cm Chalcopyrite ep Tetrahedrite unknown locality in China 6.5 x 5.3 x 3.3 cm On the center left, just above the calcite, you can see chalcopyrite smoothly covering the edge {221} faces of the tetrahedrite.

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