Rhodochrosite
Burlington Mine, Butte Mining District, Silver Bow County, Montana, USA
Rhodochrosite partially stained by black manganese oxide. Matrix consists of galena, rhodonite, and quartz. A thin black film of manganese covers about half of the pink rhodochrosite rhombohedral crystals. Minor quartz associated. From the heavily stained manganese mine dumps near the site of the Burlington Mine, West of Butte City proper. DE ...
© Daniel Evanich 2022