... in dyed yellow, orange, red, brown and other colors, hardness 7.8, specific gravity 4.6-4.71, 1.93-2 ... , zirconium sulfate, etc.). 2012 HOT SELL zircon-sand.60-65% 80-120M Zircon Sand zirconium silicate Zr(SiO4) zircon Flour Zircon Sand for sale