VS
Name
—
Fe²⁺Fe³⁺₂(PO₄)₂(OH)₂
Formula
—
Mineral Species
Entry type
—
Phosphates
Chemical class
—
Monoclinic
Crystal system
—
6
Mohs hardness
—
3.6–3.62
Specific gravity
—
Dark blue
Streak
—
Vitreous to earthy
Luster
—
—
Cleavage
—
P2_1/c
Space group
—
Lazulite
Structural group
—
Bsa · Grandfathered
IMA
—
1954
Named in
—
Dark blue, blue-green
Typical colors
—
Fe · P · O · H
Elements
—