Arfvedsonite from Cheyenne Mining District (St. Peters Dome Mining District), El Paso County, Colorado, USA
USA | |
| Pearl, R.M. (1958) Colorado Gem Trails & Mineral Guide. Sage Books, Chicago, Illinois. Minerals of Colorado. |
Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. |