“Hexagonal crystals of molybdenite in quartz vein. Size 6,5×5 cm. Collection of Geologický pavilon of VŠB-Technical University of Ostrava (http://geologie.vsb.cz/gp ). ”
“Hexagonal crystal of molybdenite in quartz vein. Size of crystal 1,2 cm. Collection of Geologický pavilon of VŠB-Technical University of Ostrava (http://geologie.vsb.cz/gp). ”