Pyroxmangite from San Juan County, Colorado, USA
USA | |
| Eckhard D. Stuart collected 9/12/15 |
| Rocks & Min.: 63: 366-384. |
Ransome, Frederick Leslie (1901) A report on the economic geology of the Silverton quadrangle, Colorado. USGS Bull 182 |
USA | |
| Eckhard D. Stuart collected 9/12/15 |
| Rocks & Min.: 63: 366-384. |
Ransome, Frederick Leslie (1901) A report on the economic geology of the Silverton quadrangle, Colorado. USGS Bull 182 |
Sunnyside Mine group, Bonita Peak, Gladstone, Eureka Mining District, San Juan County, Colorado, USA