Number 26

Color--------------------Colorless to pale shades of brown

Luster------------------Nonmetallic, glassy to pearly

Streak------------------White

Hardness--------------2.5 on cleavage face, 4.0 across cleavage surfaces.

Cleavage/-------------Cleavage, perfect basal Fracture                   cleavage

S.G.---------------------2.8 - 2.9

Special Properties---Easily distinguished from Biotite based on color

Formula-----------------KAl2(AlSi3O10)(OH)2

Mineral Name---------Muscovite

Family-------------------Silicates

Uses---------------------Used as insulator for electrical equipment.

Muscovite