Copper from Lake County, Colorado, USA
USA | |
| Geology and Mining Industry of Leadville, Samuel F. Emmons, 1886 |
| Mineralogical Record:16(3):171-201 |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
Ibex Mine, Breece Hill, Leadville, Lake County, Colorado, USA