VS
Name
—
Na(Li₁.₅Al₁.₅)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃F
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Hexagonal
Crystal system
—
7.5
Mohs hardness
—
—
Specific gravity
—
White
Streak
—
Vitreous
Luster
—
[Poor/indistinct on {0001}.]
Cleavage
—
R3m
Space group
—
Tourmaline
Structural group
—
Felb · Approved
IMA
—
2011
Named in
—
Blue-green
Typical colors
—
Na · Li · Al · Si · O · B · H · F
Elements
—