Specimen Number46-4-030Alternate Number57-15 Mn 37CommentsBlocky "psilomelane" with ubiquitous open space. Need XRD to evaluate mineralogy.In Teaching CollectionNoMineral(s)psilomelaneRock NameMn oreDistrictTarkwaMineNsutaExternal LinkMindatGeo-LocationHill A.Deposit TypeMetamorphosed ExhaliteGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience