Siderite from selected localities.
USA | |
| U.S. Geological Survey Professional Paper 1753; Irving, J.D. (1905), Ore Deposits of the Ouray District, Colorado, USGS Bulletin 260: 50-77 |
| Rocks & Min 70:5 pp 298-310; Rocks & Minerals 82:368-380 |
A.Mathauser collection; small rhombohedral crystals on dogtooth calcites |
Pony Express Mine, Paquin Mining District, Ouray County, Colorado, USA