VS
Name
—
(Ca,Ce,La)(Zr,Fe)(Mg,Fe)₂(Ti,Fe,Cr,Al)₁₈O₃₈
Formula
—
Mineral Species
Entry type
—
Oxides & Hydroxides
Chemical class
—
Hexagonal
Crystal system
—
7.5
Mohs hardness
—
4.42
Specific gravity
—
Iron-gray
Streak
—
Metallic to submetallic
Luster
—
—
Cleavage
—
R-3
Space group
—
Crichtonite
Structural group
—
Lvg · Approved
IMA
—
1977
Named in
—
Black; white to grayish white in reflected light
Typical colors
—
Ca · Ce · La · Zr · Fe · Mg · Ti · Cr · Al · O
Elements
—