MF: Zr2SiO4

Specific gravity: 4.6-4.71

Bulk density: 170-180 lb/ft3; 2700 kg/m3;

Hardness: 7.8 Moh

Angle of repose: 30 degree;

Melting point: 4000°F, 2550°c

efractive index: 1.93 to 2.01

Thermal stability: no change to 3090°F, 1700°c

Loss on ignition: 0.02%-0.12%

Color: Colorless transparent crystal