|AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Michigan > Psilomelane (romanèchite+hollandite+cryptomelane)|
|Locality:||Ironwood District, Gogebic County, Michigan|
|Description:||Heavy specimen of brown black psilomelane with mammilary hemispherical formations to 30 mm diameter on the top face. Psilomelane is a mixture of oxides of manganese composed of romanèchite, hollandite, cryptomelane, etc.). Ex. Morris Museum Geology Department (N.J.)|
|Overall Size:||11x9x5.5 cm|
|Status:||For reference only|
|Buy similar:||Minerals from Midwest, USA > Oxide Mineralss|
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