Calcite from selected localities.
USA | |
| Rocks & Min 70:5 pp 298-310; Bill and Diana Dameron Collection, other Colorado collections |
Minerals of Colorado (1997) Eckel, E. B. | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
Howard Quarry, Howard, Fremont County, Colorado, USA