A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Almandine in a schist from the Black Hills, USA |
|---|---|
| Description | Almandine, Fe3Al2Si3O12, is a common metamorphic mineral that is sometimes used by metamorphic geologists to estimate the degree of metamorphism. Here we see equant (equidimensional) almandine crystals in a fine grained mica schist from near Custer, South Dakota. The almandine has a deep red color and almost appears black when viewed from a distance. Almandine is the iron-aluminum variety of garnet. This sample is about 7 cm across. |
| Location | USA ▹ South Dakota. Near Custer. Black Hills. |
| Photographer | Darla Sondrol. 2001-04-09. |
| Collection | University of North Dakota Mineralogy Collection #1183. |
| Key words | almandine, South Dakota, Black Hills |
| Tech details | 879 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 309 |
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