Pyrite from Boulder Batholith, Jefferson County, Montana, USA
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| USGS Bulletin 988-G(1953) USGS Bull 988G |
(2005) Mineral Resources Data System (MRDS), US Geological Survey. | |
(2005) Mineral Resources Data System (MRDS), US Geological Survey. | |
| Sweeney, Ryan (2018), personal communication with Mindat.org. |