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Bornite, Quartz

Locality: Leonard Mine, Berkeley Pit, Butte, Butte District (Summit Valley District), Silver Bow Co., Montana, USA

5.0 x 3.7 x 1.6 cm. Three large, sharp, discrete bornite crystals set on a contrasting quartz crystal plate from the famous Leonard Mine at Butte. The lightly iridescent crystals reach 2.0 cm, close to the maximum of 3.0 cm noted at Butte in the literature. Ex. George Elling Collection.

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Photo added: 26th Aug 2008

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