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Mammilary Formations of Psilomelane
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Collection |
John Betts - Fine Minerals |
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Description |
Mammilary formations of iridescent brown-black Psilomelane (mixture of oxides of manganese composed of Romanechite, Hollandite, Cryptomelane, etc.). |
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Locality |
Ironwood District, Gogebic County, Michigan |
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Dimensions |
7 x 4 x 2.5 cm. |
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Specimen Grade |
B |
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Photograph |
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