A Geoscience Digital Image Library

TitleStaurolite in a schist from the Black Hills, South Dakota
DescriptionStaurolite, Fe2Al9Si4O22(OH)2, is a common metamorphic mineral that is sometimes used by metamorphic geologists to estimate the degree of metamorphism. Here we see brown staurolite crystals in a fine grained mica schist from near Custer, South Dakota. The crystals do not stand out much, which is typical for staurolite because it has a dull brown color and because it weathers quite easily. This sample is about 9 cm across.
LocationUSA ▹ South Dakota. Near Custer. Black Hills.
PhotographerShannon Heinle. 2001-03-26.
CollectionUniversity of North Dakota Mineralogy Collection #1207.
Key wordsStaurolite, South Dakota, Black Hills
Tech details904 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number267