S.Nocontentspersentagepersentage grade Grade ab 1al2o 352%min50%min 2 T-sio26% max12% max 3 Tio23% max3% max 4 Fe2o322% max22% max 5size90% (0-3090% (0-300 mm) Mm) 6lump formsmall stonesmall stone 7 Moisture8%max4% max Bulk packaging in heavy load vessels