VS
Name
—
MgAl₂O(SiO₄)(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
6.5
Mohs hardness
—
3.25
Specific gravity
—
—
Streak
—
—
Luster
—
{001}, perfect
Cleavage
—
C2/c
Space group
—
Chloritoid
Structural group
—
Mcld · Approved
IMA
—
1963
Named in
—
Pale blue-green to dark blue; in transmitted light, colorless
Typical colors
—
Mg · Al · O · Si · H
Elements
—