Mineral Name
Chemical Formula
KAl2(AlSi3O10)(OH)2
Preview
Color
white, gray, silver white, brownish-white, greenish-white
Class
Article
Luster
vitreous - pearly
Diaphaneity
transparent to translucent
Hardness
2.77-2.88
Cleavage
1 direction: {001} perfect
Fracture
uneven, flat surfaces
Density
2.8-3.4
Crystal Shape
distinct crystals rare, usually tabular with prominent {001}.
Crystal System
Monoclinic
COinS
