Muscovite from 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. |
[var. Sericite] Ransome, Frederick Leslie (1901) A report on the economic geology of the Silverton quadrangle, Colorado. USGS Bull 182 | |
[var. Sericite] (2005) Mineral Resources Data System (MRDS), US Geological Survey. |