VS
Name
—
KAlSiO₄
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Hexagonal
Crystal system
—
6
Mohs hardness
—
2.59–2.62
Specific gravity
—
—
Streak
—
Vitreous to greasy
Luster
—
Poor on {1010}, {0001}
Cleavage
—
P31c
Space group
—
Tridymite-Nepheline
Structural group
—
Kls · Grandfathered
IMA
—
1942
Named in
—
Colorless, white, gray; in thin section, colorless
Typical colors
—
K · Al · Si · O
Elements
—