| 10hlkmtr ((19 pc CHALCOPYRITE and Associated Minerals Flat)), $20 MINIMUM BID, Gap Nickel Mine, Lancaster County, Pennsylvania, 2 to 10 cm, FLAT of 19 thumbnail to cabinet, | |
 | Here is a flat of specimens from the classic Pennsylvania locality of Gap Nickel Mine. The obvious mineral is the Chalcopyrite on almost all specimens. Other species that may be present are Pyrrhotite, Pentlanite, Millerite, and Amphibole. |
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