| 7020 BORNITE with minor ENARGITE and COVELLITE, OPENING BID $50, Butte, Montana, 13 x 9 x 4 cm, Cabinet | |
 | Here is a cabinet specimen of a sulfide combination. The one side has a large crystal of Bornite. Minor blue small Covellite, larger grey black Enargite, and brassy Chalcopyrite are also present. Old collection piece acquired in a trade with a Butte collector. |
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