Petzite from Magnolia Mining District, Boulder Co., Colorado, USA
USA | |
| Minerals of Colorado (1997) E.B. Eckel |
| U.S. Geological Survey Professional Paper 223 |
U.S. Geological Survey Professional Paper 223 |
USA | |
| Minerals of Colorado (1997) E.B. Eckel |
| U.S. Geological Survey Professional Paper 223 |
U.S. Geological Survey Professional Paper 223 |