A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Muscovite books showing pseudohexagonal symmetry and good basal cleavage |
|---|---|
| Description | These samples of the muscovite, a mica, were collected from a pegmatie mine near Custer. Micas form books and show good basal cleavage because of their layered atomic arrangement. These samples are large, almost 15 cm in longest dimension, and show some hints of their pseudohexagonal symmetry. |
| Location | USA ▹ South Dakota. Near Custer. |
| Photographer | Dexter Perkins. 2000-11-29. |
| Collection | University of North Dakota Mineralogy Collection. |
| Key words | muscovite, cleavage, pseudohexagonal, mica, South Dakota |
| Tech details | 123 KB. Hand specimen. Provia E6 film, Canon A1 with macro lens, 1350dpi. |
| GeoDIL number | 7 |
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