VS
Name
—
Li₂(Mg₃Al₂)Si₈O₂₂(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
5–6
Mohs hardness
—
2.95–3.13
Specific gravity
—
White, with sky-blue tinge
Streak
—
Vitreous
Luster
—
Perfect on {210}, intersecting at ~54° and ~126°; partings on {001}, {112}, and {113}
Cleavage
—
Pnma
Space group
—
Amphibole
Structural group
—
Hlm · Approved
IMA
—
1913
Named in
—
Black, dark violet to light sky-blue; pale yellow to violet in thin section
Typical colors
—
Li · Mg · Al · Si · O · H
Elements
—