VS
Name
—
Mg₂(Mg₃Al₂)(Si₆Al₂)O₂₂(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
5.5–6
Mohs hardness
—
3.15–3.26
Specific gravity
—
white
Streak
—
Vitreous
Luster
—
Perfect on {210}, intersecting at 54± and 126±, imperfect on {010}, {100}
Cleavage
—
Pnma
Space group
—
Amphibole
Structural group
—
Ged · Approved
IMA
—
1836
Named in
—
Brown, Green, Gray
Typical colors
—
Mg · Al · Si · O · H
Elements
—