A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Prehnite |
|---|---|
| Description | Prehnite, Ca2Al2Si3O10(OH)2, is a green to grayish-white or colorless orthorhombic mineral occurring as granular masses and crystal aggregates, having a specific gravity of 2.90 to 2.95 and a hardness of 6 to 6.5 on the Mohs scale. Typical prehnite forms rather thick crusts with a rough or crystaline texture. It is found in cavities in basic igneous rocks and with hydrothermally altered rocks. Prehnite was named after the Dutch Colonel, H. Von Prehn (1733-1785). |
| Location | USA ▹ New Jersey. Near Patterson. |
| Photographer | Shannon Heinle. 2002-02-07. |
| Collection | University of North Dakota Mineralogy Collection #1269. |
| Key words | prehnite, new jersey, silicate |
| Tech details | 545 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 2258 |
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