The Properties Microcrystal Wear Alumina Beads The Mainly Chemical Composition Al2O3 more than 90% CaO+MgO+Fe2O3+others 2% Bulk Density 3.60g/cm3 Water Absorption <0.01% Hardness(Mohs) more than 9 Color White Application area Chemical engineering,Printing ink, to put on make-up