Chalcocite from Eight Mile Park Pegmatite Mining District, Fremont County, Colorado, USA
USA | |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |
Pearl, 1958. Colorado Gem Trails & Mineral Guide | |
Pearl, 1958. Colorado Gem Trails & Mineral Guide |