VS
Name
—
(Fe³⁺,Fe²⁺, )₂(SiO₄)
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
5.5–6.5
Mohs hardness
—
3.967
Specific gravity
—
Pale brown, blackish brown
Streak
—
Submetallic to metallic
Luster
—
Perfect on {100} and {010}, two less perfect »? {100} and intersecting at 60±
Cleavage
—
P2_1/b
Space group
—
—
Structural group
—
Lai · Approved
IMA
—
1976
Named in
—
Black; gray in reflected light
Typical colors
—
Fe · Si · O
Elements
—