French Creek Mines, Chester Co., Pennsylvania, USA
110mm x 100mm x 40mm
A superb old classic from Pennsylvania with large hoppered brassy crystals of chalcopyrite measuring is larges 2.5 cm in size across the top of this matrix with minor crystalline pyrite. In terrific condition, the quality is much better than most from this locality. Comes with a neat old label.
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4,927,696 minIDs have been issued as of 18th Sep 2019 11:07 pm BST