Muscovite from Pick's Delta Mine, San Rafael Swell Mining District, Emery County, Utah, USA
USA | |
| [var. Illite] Bullock, Kenneth C. (1981) Minerals and mineral localities of Utah. Bulletin 117. Utah Geological and Mineral Survey |
USA | |
| [var. Illite] Bullock, Kenneth C. (1981) Minerals and mineral localities of Utah. Bulletin 117. Utah Geological and Mineral Survey |