A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Sandy gypsum from near Pierre, South Dakota |
|---|---|
| Description | Gypsum, CaSO4•2H2O, sometimes forms in sandy areas, and crystals may trap sand inside when forming, causing a specimen to become brown and opaque. These sand inclusions sometimes form hourglass formations in a crystal. This specimen is about 8 cm in longest dimension. |
| Location | USA ▹ South Dakota. Near Pierre. |
| Photographer | Darla Sondrol. 2001-07-02. |
| Collection | University of North Dakota Mineralogy Collection. |
| Key words | gypsum, South Dakota |
| Tech details | 951 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 1015 |
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