VS
Name
—
Al₄₊₂ₓSi₂₋₂ₓO₁₀₋ₓ (x ≈ 0.4)
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
6–7
Mohs hardness
—
3.11–3.26
Specific gravity
—
white
Streak
—
Vitreous
Luster
—
Distinct on {010}
Cleavage
—
Pbam
Space group
—
—
Structural group
—
Mul · Grandfathered
IMA
—
1924
Named in
—
Colorless, White, Pink, Gray
Typical colors
—
Al · Si · O
Elements
—