Muscovite is the most common mica, found in granites, pegmatites, gneisses, and schist's, and as a contact metamorphic rock or as a secondary mineral resulting from the alteration of topaz, feldspar, kyanite, etc.
Muscovite bụ ihe kachasị dị na mica, nke a na-ahụ na granite, pegmatites, gneisses, na schist, yana dịka kọntaktị metamorphic ma ọ bụ dịka ịnweta nke abụọ sitere na mgbanwe nke topaz, feldspar, kyanite, wdg.