It occurs in high temperature hydrothermal deposits and contact metamorphic rocks.
2.
Contact metamorphic rocks are usually known as hornfels.
3.
It typically occurs in contact metamorphic rocks.
4.
Muscovite is the most common mica, found in granites, pegmatites, gneisses, and schists, and as a contact metamorphic rock or as a secondary mineral resulting from the alteration of topaz, feldspar, kyanite, etc . In pegmatites, it is often found in immense sheets that are commercially valuable.
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