Pyrite from Copper King Mine (Yeager's Mine), Gold Hill, Gold Hill Mining District, Boulder County, Colorado, USA
USA | |
| [var. Bravoite] Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. Rocks & Min.: 16:413 22:205. American Mineralogist 28:257-271 |