... , corrosion. 3.High stability. 4.made in shandong 1 zircon sand mine is usually colorless and transparent crystal state2.hardness 7.8 ... , resulting in dyed yellow, orange, red, brown and other colors, hardness 7.8, specific gravity 4.6-4.71, 1.93 ... dioxide, zirconium oxychloride, zirconium, sodium fluorozirconate, potassium, zirconium sulfate, etc.). High quality Zirconium Sand with best price