General Information:
Chemical Formula:
(As,Sb)2(Ti,V,Fe,Al)12O23OH
IMA Status:
Approved IMA
Physical Properties:
Cleavage:
None
Color:
black, dark gray, or dark brown.
Diaphaniety:
Opaque
Hardness:
6.5 - Pyrite
Luster:
Sub Metallic
Streak:
black
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