muscovite (1)youdaoicibaDictYouDict[muscovite 词源字典]
"A silver-grey form of mica occurring in many rocks", Mid 19th century: from obsolete Muscovy glass (in the same sense) + -ite1.[muscovite etymology, muscovite origin, 英语词源]
Muscovite (2)youdaoicibaDictYouDict
"A native or citizen of Moscow", From modern Latin Muscovita, from Muscovia (see Muscovy).