Pyrolusite from Fremont County, Wyoming, USA
USA | |
| Rocks&Min 76:23-241 |
| Rocks & Minerals 76:386 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
USA | |
| Rocks&Min 76:23-241 |
| Rocks & Minerals 76:386 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |