VS
Name
—
Na(Al₁.₅Li₁.₅)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Hexagonal
Crystal system
—
7.5
Mohs hardness
—
2.9–3.1
Specific gravity
—
white
Streak
—
Vitreous to resinous
Luster
—
{1120}, {1011}, very poor
Cleavage
—
R3m
Space group
—
Tourmaline
Structural group
—
Elb · Grandfathered
IMA
—
1913
Named in
—
Green, Pink, Blue, Red, Colorless, Yellow, Black
Typical colors
—
Na · Al · Li · Si · O · B · H
Elements
—