| Title | Byssolite with calcite and magnetite |
| Description | Byssolite is a variety of actinolite composed of microscopically fibrous crystals. It has the chemical formula of Ca2(Fe,Mg)5Si8O22(OH)2. This sample is about 11 cm. |
| Location | USA ▹ Pennsylvania. Near Chester. Near French Creek. |
| Photographer | Shannon Heinle. 2001-10-25. |
| Collection | University of North Dakota Mineralogy Collection #1393. |
| Key words | byssolite, actinolite, amphibole |
| Tech details | 887 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera. |
| GeoDIL number | 1710 |
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