Specimen Number46-4-013Alternate Number58-2-10CommentsCryptomelane with minor pyrolusite and dull black hard oxide, and minor brownish-black wad in cavities.In Teaching CollectionNoMineral(s)cryptomelanepyrolusitemn-oxidewadRock NameMn oreDistrictAmapa, BrazilMineSerra do NavioExternal LinkMindatDeposit TypeLateriteGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience