Muscovite from Boulder Batholith, Jefferson County, Montana, USA
USA | |
| USGS Bulletin 988-G(1953) |
[var. Sericite] (In preparation) | |
Sweeney, Ryan (2018), personal communication with Mindat.org. | |
| William C. van Laer, The Lapidary Journal May 1985 |
WC van Laer, 2008 | |
W.C. van Laer, 2008 | |
van Laer, W.C. (1979) Tourmalines of the Homestake Pass. Lapidary Journal, 33, 58-64. | |
| [var. Sericite] (2005) Mineral Resources Data System (MRDS), US Geological Survey. Rocks & Minerals 47:3 pp160-164 |
Boulder Batholith, Jefferson County, Montana, USA