A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Orthoclase with Quartz |
|---|---|
| Description | Orthoclase belongs to the Feldspar group. Orthoclase is a polymorph of other minerals that share the same chemistry, but have different crystal structures. Orthoclase is the main k-spar of granites and syenites that cooled moderately quickly. Twinning is common in all feldspars and Carlsbad twinning is more common in Orthoclase. Orthoclase comes from the Greek orthos meaning “right” and kalo meaning “I cleave” in allusion to the mineral's right angle of good cleavage. |
| Photographer | Shannon Heinle. 2002-09-13. |
| Collection | University of North Dakota Mineralogy Collection #1657. |
| Key words | orthoclase, feldspar, twinning |
| Tech details | 380 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 2912 |
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