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Birnessite
€12.00
Black and shiny crystal section in ussingiteKarnasurt, Lovozero, Kola peninsula, Russia
Black and shiny crystal section (2.5 cm) in ussingite. A good specimen
AN_210
1 Item
Data sheet
- Locality
- Karnasurt, Lovozero, Kola peninsula, Russia
- Size category
- Miniature
- Size (cm)
- 5x3x3
- Weight
- 44 g
- Formula
- (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
- Properties
- Black, soot-like. Soft and brittle. Shiny on unaffected surfaces
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Black and shiny crystal section in ussingiteKarnasurt, Lovozero, Kola peninsula, Russia