Pyrite, Chalcopyrite, Bornite Specimen from Bingham Canyon Mine, UT
This is from the estate of a mining engineer from the Bingham Canyon Mine in Utah. He worked at the mine in the 1970's. This massive 13+ pound sample is one of the best I have ever seen. The surface is crystalline pyrite with bornite patina. Vugs are filled with chalcopyrite. The crystal development is incredible!