VS
Name
—
Ca₄[Mg₈Fe³⁺₂Ti₂]O₄[Si₆Al₆O₃₆]
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Triclinic
Crystal system
—
5–6
Mohs hardness
—
3.4–3.76
Specific gravity
—
—
Streak
—
Semimetallic
Luster
—
{010}, {001}, good
Cleavage
—
P-1
Space group
—
Sapphirine
Structural group
—
Rhö · Approved
IMA
—
1907
Named in
—
Dark brown to black
Typical colors
—
Ca · Mg · Fe · Ti · O · Si · Al
Elements
—