Tetrahedrite Subgroup from selected localities.
USA | |
| Eckel, E.B. (1997) Minerals of Colorado. |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; U.S. Geological Survey Professional Paper 223 | |
Minerals of Colorado (1997) Eckel, E. B. | |
Minerals of Colorado (1997) Eckel, E. B. | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; U.S. Geological Survey Professional Paper 223 |
| Minerals of Colorado (1997) E.B. Eckel |