Specimen Number46-4-032Alternate Number57-15 Mn 42CommentsLayered "psilomelane", with abundant open space. Need XRD to evaluate mineralogy.In Teaching CollectionNoMineral(s)psilomelaneRock NameMn oreDistrictTarkwaMineNsutaExternal LinkMindatDeposit TypeMetamorphosed ExhaliteGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience