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Corundum Item white corundum brown corundum Al2o3(%min) 99.2 95 Fe2o3(%max) 0.5 0.5 Tio2(%max) - 3 Na2o+k2o(%max) 0.4 - B.D?g/cm3? 3.7 3.8 A.P 8 8 True specific weight 3.95 3.97 Follow the inquire