Pyrolusite from Mineral County, Colorado, USA
USA | |
| Econ Geol (1984) 79:439-447 |
Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
USA | |
| Econ Geol (1984) 79:439-447 |
Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |