| 15dm931.is ((3 BORNITE, PYRITE, QUARTZ, et al)), $10 MINIMUM BID, Steward Mine, Butte, Silver Bow County, Montana, 8 to 11 cm in length, Cabinet, | |
 | Here are 3 specimens of massive ore from the Steward Mine in Butte. Iridescent Bornite and other species present. ex Dennis McMurdie collection. |
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