Gerasimovskite

General Information:
 Chemical Formula:
(Mn,Ca)(Nb,Ti)5O12·9(H2O) (?)
Physical Properties:
 Color:
brown, gray, or light gray.
 Density:
2.52 - 2.58, Average = 2.54
 Diaphaniety:
Translucent to Opaque
 Hardness:
2 - Gypsum
 Luster:
Pearly
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