Specimen Number40-3-010Alternate Number9663CommentsHard, dense Mn-ox.In Teaching CollectionNoMineral(s)mn-oxideRock NameMn oreDistrictMinas GeraisExternal LinkMindatGeo-LocationCabecado de Ferro, Morro Grande. Similar location to 40-3-004 and 008.Deposit TypeSedimentaryDonated ByUniversity of Wisconsin-Madison Department of Geoscience