Muscovite is found in igneous, metamorphic and sedimentary rocks. In igneous rocks it is a primary mineral that is especially common in granitic rocks. In granite pegmatites muscovite is often found in large crystals with a pseudohexagonal outline.
Parmelee is located in Todd County, SD. The population is 674, making Parmelee the 4th largest city in Todd County. There are 1 public schools in Parmelee with an average Homefacts rating of NA. there are 9 registered sex offenders residing in the city.
The silver deposits of the Reese River mining district were discovered in 1862. The town of Austin was established, and in 1863 became the county seat of the newly formed Lander County. By 1867, there were 11 ore-processing mills in the district.