Jianshuiite

General Information:
 Chemical Formula:
(Mg,Mn++)Mn++++3O7·3(H2O)
 IMA Status:
Approved IMA
Physical Properties:
 Color:
brown or brownish black.
 Density:
3.6
 Diaphaniety:
Opaque
 Hardness:
1.5-2 - Talc-Gypsum
 Luster:
Metallic
 Streak:
brown
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