VS
Name
—
Ca₂Mn³⁺₃(SiO₄)(Si₂O₇)(OH)₃
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
5–5.5
Mohs hardness
—
3.43
Specific gravity
—
Brown with a reddish tint
Streak
—
Silky to subadamantine
Luster
—
Perfect on {001}
Cleavage
—
P2_1/m
Space group
—
—
Structural group
—
Mcf · Approved
IMA
—
1974
Named in
—
Reddish brown, maroon, dull pink
Typical colors
—
Ca · Mn · Si · O · H
Elements
—