Hollandite
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Hollandite
Mynodd Nodol. Llanyeil, Gwynedd, Wales
1226
Large cavity richly filled with botryoidal hollandite, a complex maganese oxide
Formula: Ba(Mn4+6Mn3+2)O16
Status: Sold
Dimensions: 75x40x32mm
Size: Small Cabinet (S)
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Minerals of the English Midlands
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