KAl2(AlSi3O10)(OH)2Monoclinic
Muscovite
KAl2(AlSi3O10)(OH)2
SilicatesChemical FormulaKAl2(AlSi3O10)(OH)2
Crystal SystemMonoclinic
Mohs Hardness2.5
Specific Gravity2.82
ColorColorless, silver, pale yellow
LusterVitreous to pearly
StreakWhite
CleavagePerfect basal
FractureFlexible sheets
Occurrence
Common mica found in granites and schists. Used in electrical insulation.