Chalcopyrite from
USA | |
| Mineralogical Record (1997) 28:3-49 |
U.S.G.S. Bulletin 255 | |
| Bastin, E. S. (1931). The fluorspar deposits of Hardin and Pope Counties. Bulletin no. 058. Bastin, E. S. (1931). The fluorspar deposits of Hardin and Pope Counties. IGS Bulletin no. 058. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. Mineralogical Record (1997) 28:3-49 |
U.S.G.S. Bulletin 255 | |
| Rocks & Min.: 24:249. |
| |
| Alan Goldstein |
Henson Mine, Hobbs Creek Mining Sub-District, Pope County, Illinois, USA