VS
Name
—
Mg₂Mg₅Si₈O₂₂(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
5.5–6
Mohs hardness
—
2.9–3.5
Specific gravity
—
White or grayish
Streak
—
Vitreous, pearly on cleavage
Luster
—
Perfect on {210}, intersecting at 54.5± and 125.5±; distinct on {010} and {100}
Cleavage
—
Pnma
Space group
—
Amphibole
Structural group
—
Ath · Approved
IMA
—
1801
Named in
—
Brown, Gray, White, Green
Typical colors
—
Mg · Si · O · H
Elements
—