brown, rarely blue slightly greyish Mineral Klockmannite mostly isotropic grey to bluegrey; 18.65 blue-grey;...twins edges Germanocolusite Loparite-(Ce) Klockmannite yes strong, brownish grey strong, orangebrown...Madenköy Mine, Çayeli, Rize Province, Black Sea Region, Turkey (sample: Halbach); XPL If marked in description... Taymyrskiy Autonomous Okrug, Eastern-Siberian Region, Russia (sample: Melcher/Oberthür); PPL D Fine-grained...grey); Himmelsfürst Mine, Brand-Erbisdorf, Freiberg District, Erzgebirge, Sachsen, Germany (sample: Seifert); |