... SA8SA6SA4SA2ZrO2≥66%≥65%≥64%≥63%Fe2O3≤0.08%≤0.10%≤0.20%≤0.25%TiO2≤0.10%≤0.10%≤0.20%≤0.30%2. Introduction Pure zircon ... brown and other colors, hardness 7.8, specific gravity 4.6-4.71, 1.93-2.01 refractive index, birefringence, absorb light directly ... dioxide, zirconium oxychloride, zirconium, sodium fluorozirconate, potassium, zirconium sulfate, etc.). 2012 HOT SELL zirconium sand with good quality