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Eckermannite, Arfvedsonite


Eckermannite : [Na][Na2][(Mg,Fe2+)4Al][(OH)2|Si8O22], Arfvedsonite : [Na][Na2][Fe2+4Fe3+][(OH)2|Si8O22]

Photo Copyright © Maurice de Graaf  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Norra Kärr, Gränna, Jönköping, Småland, Sweden
width of picture is about 5mm. The blue mineral is the Eckermannite.

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