VS
Name
—
KAl₃(SO₄)₂(OH)₆
Formula
—
Mineral Species
Entry type
—
Sulfates
Chemical class
—
Hexagonal
Crystal system
—
3.5–4
Mohs hardness
—
2.6–2.9
Specific gravity
—
White
Streak
—
Vitreous, somewhat pearly on {0001}
Luster
—
On {0001}, perfect
Cleavage
—
R-3m
Space group
—
Alunite-Alunite
Structural group
—
Alu · Approved
IMA
—
1565
Named in
—
White, Gray, Yellow, Pink, Red
Typical colors
—
K · Al · S · O · H
Elements
—