VS
Name
—
(Fe²⁺,Fe³⁺)₂₋₃Si₂O₅(OH)₄
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
—
Mohs hardness
—
2.85–3.15
Specific gravity
—
—
Streak
—
—
Luster
—
—
Cleavage
—
C2/m
Space group
—
Serpentine, Clay
Structural group
—
Gre · Grandfathered
IMA
—
1903
Named in
—
Green, light yellow-green; blue-green in transmitted light
Typical colors
—
Fe · Si · O · H
Elements
—