A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Gypsum crystals from near Bullion Butte, North Dakota, USA |
|---|---|
| Description | Gypsum, CaSO4•2H2O, is found in many places. Often it is massive and fine grained. Fine grained white varieties are called alabaster. Fibrous varieties are called satin spar. Coarser, clear bladed varieties are called selenite. This sample falls between: it is bladed but the blades are coated with fine crystals and are not clear enough to be called selenite. The specimen is 8 cm across. |
| Location | USA ▹ North Dakota. Near Bullion Butte. |
| Photographer | Darla Sondrol. 2001-06-05. |
| Collection | University of North Dakota Mineralogy Collection #791. |
| Key words | gypsum, North Dakota |
| Tech details | 763 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 617 |
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