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Vernadite

About

Approved, 'Grandfathered' (first described prior to 1959), Questionable

Type Locality
Kusimovskoye, Bashkortostan Republic, Southern Urals, Urals Region, Russia
Mineral Data
(Mn4+,Fe3+,Ca,Na)(O,OH)2 · nH2O
Strunz: 
4.FE.40
Physical Properties
Colour: 
Black
Crystal System: 
Hexagonal
Streak: 
Dark Brown, Black
Hardness: 
2 -