... -3.9PHYSICAL CHARACTERISTICSBasic MineralSiO2,Al2O3ColourBrown,RedDensity3.90g/cm3 minMohs Hardness7.4-8.0 APPLICATION: 1. Sandblasting2. Waterjet cutting3. Resin and ... . Free grinding and polishing5. Filter Medium6. Surface Preparation Available Sizes:24, 30, 36, 40, 46, 54, 60, 70, 80, 90, 100 ... , 120, 15020/40,30/60 10/20,20/8012/24,20/60Other special size could be supplied as required. Garnet ...