| 5hemglr ((CHALCOPYRITE on PYRITE)), $100 MINIMUM BID, Bingham Copper Mine, Bingham Canyon, Salt Lake County, Utah, 15 x 12 x 6.5 cm, Cabinet | |
 | Here is a large hard to find specimen from the Kennecott Copper Mine in Salt Lake City. This came from an old collection from the north central USA. It has very large Chalcopyrite crystals with a blackish grey coating which looks like Chalcocite similar to the Pyrite coated with Chalcocite. The Chalcopyrite crystals are on a matrix of Pyrite with Pyrite crytals on the surface. This is a fine old Utah specimen. |
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