Specimen Number46-4-005Alternate Number58-2-1CommentsPyrolusite + cryptomelane with minor wad + fibrous lithiophorite. Extremely hard. Need XRD on this evaluate bulk mineralogy.In Teaching CollectionNoMineral(s)pyrolusitecryptomelanemn-oxidelithiophoriteRock NameMn oreDistrictAmapa, BrazilMineSerra do NavioExternal LinkMindatDeposit TypeLateriteGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience