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Cryptomelane


Cryptomelane : K(Mn4+,Mn2+)8O16

Photo Copyright © ian jones  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Moel Llyfnant Mine, Moel Llyfnant, Llanycil, Gwynedd (Merionethshire), Wales, UK
Botryoidal cryptomelane in a 25x20mm cavity. Collected 2006, Ian Jones collection.

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