Aluminum Oxide (Al2O3) 55 % Min Below 54% Rejection Ferric Oxide (Fe2O3) 18-24 % nominal Silicon Dioxide (SiO2) 6 % Max above 7 % Rejection Titanium Oxide (TiO2) 11 % Max Calcium Oxide (CaO) 1.50% Max Magnesium Oxide (MgO) 1.50% Max Loss on Ignition (LOI) 11-14 % average Moisture 4.00% Max Size 0-200mm depends of the Clint