A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Orthoclase, Petschau, Bohemia |
|---|---|
| Description | This orthoclase (KAlSi3O8) crystal is about 7 cm across. Actually it is two crystals grown together as a “twin.” Orthoclase is a feldspar, and twinning is common in all feldspars. Orthoclase twins by different “laws” including the Carlsbad Law, the Manebach Law and the Baveno Law. Shown here is a Carlsbad twin, equivalent to two intergrown crystals growing in opposite directions. |
| Location | Bohemia. Near Petschau. |
| Photographer | Darla Sondrol. 2001-07-02. |
| Collection | University of North Dakota Mineralogy Collection. |
| Key words | orthoclase, Bohemia |
| Tech details | 766 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 1016 |
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