General Information:
Chemical Formula:(Mn++++,Fe+++,Ca,Na)(O,OH)2·n(H2O)
Environment:Marine and fresh water iron-manganese crusts and concretions, often in relict bacterial forms.
Locality:Somewhere in Russia.
Name Origin:Named for Vladimir Ivanovich Vernadskii (1863-1945), Russian natrualist and geochemist.
Physical Properties: Color:black or chocolate brown.
Density:3
Diaphaniety:Opaque
Streak:chocolate brown
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