Chalcopyrite on Bornite after Enargite with Pyrite, Quartz, Calcite
specimen number:
3671077
location:
Steward mine, Butte, Silver Bow Co., Montana, USA
description:
Bluish iridescent crystallized chalcopyrite on previous crystals of what were once enargite to 2.0 cm in size those now replaced by enargite. These set on a matrix of sparkling crystallized quartz with minor pyrite and calcite. In very good condition as seen.
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