Quartz from selected localities.
USA | |
| U.S. Geological Survey, (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; USGS MRDS (ID DC0370)1 |
Minerals of Colorado (1997) Eckel, E. B. | |
| Minerals of Colorado (1997) Eckel, E. B. |
Minerals of Colorado (1997) E.B. Eckel |