Amethyst from Ouray Mining District, Ouray County, Colorado, USA
USA | |
| Robert Stoufer collection |
| Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. 2008 New Mexico Mineral Symposium abstracts |
Robert Stoufer collection |
Ouray, Ouray Mining District, Ouray County, Colorado, USA