Tag: sericite
Sericite thin section
From Greek word for silky, in allusion to its silky luster.
Formula: KAl2(AlSi3O10)(OH)2
System: Monoclinic
Color: White to colorless, silvery-white
Lustre: Vitreous, Silky, Pearly
Hardness: 2½
Density: 2.77–2.88
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