General Information:
Chemical Formula:
(Ba,H2O)2(Mn++++,Mn+++)5O10
IMA Status:
Approved IMA 1967
Physical Properties:
Cleavage:
None
Color:
grayish black, black, or steel gray.
Density:
6.45
Diaphaniety:
Opaque
Hardness:
5-6 - Between Apatite and Orthoclase
Luster:
Sub Metallic
Streak:
brown black
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