Specimen Number46-4-006Alternate Number58-2-2CommentsHard ore, cryptomelane + other Mn-oxides. Need XRD to evaluate bulk mineralogy.In Teaching CollectionNoMineral(s)cryptomelanemn-oxideRock NameMn oreDistrictAmapa, BrazilMineSerra do NavioExternal LinkMindatDeposit TypeLateriteGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience