Pyrrhotite from selected localities.
USA | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Nash, J. Thomas (1988) Geology and geochemistry of gold deposits of the Big Canyon area, El Dorado County, California USGS Bull 1854 |