| 15dm930.is ((CHALCOPYRITE, PYRITE)), $20 MINIMUM BID, French Creek Mines, St Peters, Chester County, Pennsylvania, 3 x 3 x 2 cm, Cabinet | |
 | Here is a specimen of hoppered Chalcopyrite and octahedral Pyrite from a classic Pennsylvania locality. The Pyrite crystals are more brassy and more lustrous and show up well in one of the photos. The collecting spot for these Chalcopyrites which are etched out of Calcite is now a housing developement. collected by Kerry Matt |
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