Pyrrhotite from Spruce Pine Mining District, North Carolina, USA
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Ross, Clarence S. (1937) Sphalerite from a pegmatite near Spruce Pine, North Carolina. American Mineralogist, 22 (5) 643-650 |
| C.W.Allen collection |
| Lesure, Frank Gardner (1968) Mica deposits of the Blue Ridge in North Carolina. Professional Paper 577. US Geological Survey doi:10.3133/pp577 |