Attributes . 18% Silicon Di Oxide (SiO2), 1% Manganese Oxide (MnO), 27% Magnesium Oxide (MgO), 25% Calcium Fluoride (CaF2), 2% Sodium Oxide (Na2O), 19% Aluminum Oxide (Al2O3), 5% Calcium Oxide (CaO), 1% Iron Oxide (FeO), 2% Potassium Oxide (K2O), 3% Metal Alloys . Names