A Geoscience Digital Image Library

TitleChalcanthite, CuSO4ยท5H2O, from Butte, Montana
DescriptionChalcanthite, a hydrated copper sulfate, is water soluble. It forms as a secondary mineral in copper deposits and, in arid regions such as northern Chile, chalcanthite is a major ore. In many copper mines, chalcanthite is an ongoing precipitate forming encrustations, aggregates and stalactites on the sides of the mine's shafts. The largest of the crusty nodules shown is 2 cm across.
LocationUSA ▹ Montana ▹ Silver Bow. Near Butte.
PhotographerNessa Eull. 2001-06-06.
CollectionUniversity of North Dakota Mineralogy Collection #829.
Key wordschalcanthite, Montana
Tech details201 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number652