Attributes . 19% Silicon Di Oxide (SiO2), 11% Manganese Oxide (MnO), 17% Magnesium Oxide (MgO), 12% Calcium Fluoride (CaF2), 2% Sodium Oxide (Na2O), 32% Aluminum Oxide (Al2O3), 2% Calcium Oxide (CaO), 2% Titanium Oxide (TiO2), 3% Metal Alloys . Names