General Description--Zirconium Silicate Appearance--Off White Colour Sand Typical Specification IRE “Q” Grade ZrO 2 (+HfO 2 ) 65.00 TiO 2 0.25 Fe 2 O 3 0.08 Origins India Applications High Temperature Applications, Primary Source for Investment Casting Shell Molds, Foundry Cores, Metal Chills, Ladle Bricks, Abrasive Cleaning, Zirconium, Chemicals, Refractory Bricks, Solid Oxide Fuel Cells and Nuclear Power Plant Toxicology--N/A Important Properties Specific Gravity--- 4.5 to 4.8 Bulk Density (lbs./ft. 3 )--- 115-130 & 170-180 Mohs Hardne