VS
Name
—
Ca₂Al₃(SiO₄)₃(OH)
Formula
—
Variety
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
6–7
Mohs hardness
—
3.1–3.38
Specific gravity
—
White
Streak
—
Vitreous, Pearly on cleavage
Luster
—
Perfect on {010}; imperfect on {100}
Cleavage
—
Pnma
Space group
—
—
Structural group
—
—
IMA
—
—
Named in
—
Blue, Purple
Typical colors
—
—
Elements
—