A Geoscience Digital Image Library

TitleRhodochrosite with covellite and pyrite from Butte, Montana
DescriptionThe pinkish mineral is rhodochrosite (manganese carbonate), a member of the calcite group. Here it is found with dark, nearly black covellite (copper sulfide) and minor pyrite (iron sulfide, hard to see in this photo). Covellite has a dark indigo-blue color when fresh, but this sample is tarnished. These minerals are often found together in hydrothermal ore deposits. This sample is 9 cm across.
LocationUSA ▹ Montana ▹ Silver Bow. Near Butte.
PhotographerDarla Sondrol. 2001-06-19.
CollectionUniversity of North Dakota Mineralogy Collection #695.
Key wordsrhodochrosite, covellite, pyrite, Montana
Tech details828 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number785