Quartz from selected localities.
USA | |
| Mineralogical Record (1997) 28:3-49 |
| Geology of the Fluorspar Deposits of Illinois; J. Weller, R. Grogan, F. Tippie, 1952 | |
| Rocks & Min.:64:18. | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| Denny, F. B., Nelson, W. J., Breeden, J. R., Lillie, R. C. (2020). Mines in the Illinois Portion of the Illinois-Kentucky Fluorspar District, Illinois State Geological Survey Circular 604. | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. | |
| Rocks & Min.: 63:224. | |
| Min News (1993) 9:3 p3 | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| Mineralogical Record (1997) 28, 3-49. |
Hastie's Quarry, Spar Mountain, Cave-In-Rock Mining Sub-District, Hardin County, Illinois, USA