Quartz from selected localities.
USA | |
| 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. |
Mineralogical Record (1997) 28:3-49 | |
U.S.G.S. Bulletin 255 | |
U.S.G.S. Bulletin 255 | |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Mineralogical Record (1997) 28:3-49 | |
U.S.G.S. Bulletin 255 |
Rosiclare, Hardin County, Illinois, USA