| Title | Penninite |
| Description | Penninite is a psuedo-trigonal form of clinoclore. It is found mainly with serpentine and schists. Penninite's mineral formula is Mg3(Si4O10)(OH)2Mg3(OH)6. |
| Location | USA ▹ Maryland. Near Rock Springs. |
| Photographer | Shannon Heinle. 2002-02-10. |
| Collection | University of North Dakota Mineralogy Collection #1427. |
| Key words | penninite, clinoclore, silicate |
| Tech details | 402 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 2298 |
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