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Birnessite
€14.00
Black crystal fragments in ussingiteKarnasurt, Lovozero, Kola Peninsula, Russia
Black, tabular crystal fragments in altered ussingite
AN_529
1 Item
Data sheet
- Locality
- Karnasurt, Lovozero, Kola Peninsula, Russia
- Size category
- Miniature
- Size (cm)
- 4.5 x 3.5 x 3
- Weight
- 21 g
- Formula
- (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
- Properties
- Sub-Vitreous, dull; black
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Black crystal fragments in ussingiteKarnasurt, Lovozero, Kola Peninsula, Russia