VS
Name
—
Ca₄[Mg₆Al₆]O₄[Si₆B₃Al₃O₃₆]
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Triclinic
Crystal system
—
6.5–7
Mohs hardness
—
3.42–3.52
Specific gravity
—
white
Streak
—
Vitreous
Luster
—
Good on {010}, {001}; (010) ^ (001) ~66°
Cleavage
—
P-1
Space group
—
Sapphirine
Structural group
—
Ser · Grandfathered
IMA
—
1903
Named in
—
Blue, Black
Typical colors
—
Ca · Mg · Al · O · Si · B
Elements
—