THE MINE CLAY - MINE "FUNTANA PIROI" - ESCALAPLANO (NU)   SODIC FELDSPAR - MINE OF "SERRA MAJORE" - LOCULI (NU)   SANDS FELDSPATIC - MINE "MOLINO FALZU" - ARDARA AND SYSTEM OF OZIERI (SS)   KAOLIN - MINE "CASTELLO DI BONVEI" - MARA (SS)