Muscovite from Sunnyside Mine group, Bonita Peak, Gladstone, Eureka Mining District, San Juan County, Colorado, USA
USA | |
| [var. Sericite] (2005) Mineral Resources Data System (MRDS), US Geological Survey. Rocks & Min.: 63: 366-384. |
USA | |
| [var. Sericite] (2005) Mineral Resources Data System (MRDS), US Geological Survey. Rocks & Min.: 63: 366-384. |