VS
Name
—
(K,Ba,Sr)(Zr,Fe)(Mg,Fe)₂(Ti,Cr,Fe)₁₈O₃₈
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Hexagonal
Crystal system
—
—
Mohs hardness
—
4.39
Specific gravity
—
—
Streak
—
Metallic
Luster
—
—
Cleavage
—
R-3
Space group
—
Crichtonite
Structural group
—
Mts · Approved
IMA
—
1982
Named in
—
Black; tan in reflected light
Typical colors
—
K · Ba · Sr · Zr · Fe · Mg · Ti · Cr · O
Elements
—