Pyrolusite from Jefferson County, Montana, USA
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
(2005) Mineral Resources Data System (MRDS), US Geological Survey. | |
| Rocks & Minerals 83:1 pp 20-33 |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
Barrick Gold Corporation | |
(2005) Mineral Resources Data System (MRDS), US Geological Survey. |