VS
Name
—
(Mg,Fe²⁺,Al, )₁₀(Si,Al,B)₅O₂₁(OH,F)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
6.5–7
Mohs hardness
—
3.29–3.35
Specific gravity
—
white
Streak
—
Vitreous
Luster
—
Good on {110}
Cleavage
—
Cmcm
Space group
—
Kornerupine
Structural group
—
Krn · Grandfathered
IMA
—
1884
Named in
—
Green, Brown, Blue
Typical colors
—
Mg · Fe · Al · Si · B · O · H · F
Elements
—