Muscovite
adj//ˈmʌs.kəˌvaɪt//moskovitisk, moskovit, Moskvabo, muskovit
Of or relating to Muscovy or Moscow, or the people of these places.
An inhabitant or native of Muscovy or Moscow.
(mineral) A pale brown mineral of the mica group, being a basic potassium aluminosilicate with the chemical formula KAl2(Si3Al)O10(OH,F)2; used as an electrical insulator etc.