17hlkm.is ((MANGANESE OXIDE ie CRYPTOMELANE?)), $10 MINIMUM BID, Taouz, Er Rachidia Province, Draa-Tafilalet Region, Morocco, 7.5 x 6 x 3.5 cm, Cabinet | |
Mounds of black botryoidal Manganese oxide species. Perhaps the species is Cryptomelane , Psilomelane, or Pyrolusite. Analysis needs to be done to determine which Manganese oxide species |