Muscovite from Martin County, Indiana, USA
USA | |
| [var. Illite] www.indiana.edu/~librcsd/etext/hoosier/IM-01.html. |
| [var. Illite] (2005) Mineral Resources Data System (MRDS), US Geological Survey. www.indiana.edu |
| [var. Illite] (2005) Mineral Resources Data System (MRDS), US Geological Survey. |