Qalab ceeriin ah oo leben leefleef leh oo leben sare leh

Alaabta ceeriin ee ugu waaweyn ee dhoobada dhoobada sare ee dhoobada ah waa dhoobada madhalayska ah (dhoobada adag ee calcined, kaolin ama pyrophyllite iyo ciidda quartz dabiiciga ah. ee lebenka silica iyo quartz-dhoobada dhoobada dhoobada-silica sare leh.