Chemical Composition - Typical SiO2 :34-40% Fe2O3:25-31% Al2O3 :17-21% MgO :5-6% MnO :1%max CaO :5-10% TiO2 :1%max Mineralogical Content - Typical Almandite garnet : 97-98 % Ilmenite :2.0%max Quartz (free silica) :1.0%max Others :0.5%max Physical Characteristics - Typical Specific Gravity :4.1 Mohs Hardness :7.5+ Acid Solubility (HCL) :1.0% max Bulk density :145 lb/ft3 Colour :Red-green Grain shape :Sub angular Toxic substances : none Available Sizes:10/20 20/40 30/60 40/60 60/90 90/120 120/180 180/220 24# 30# 36# 40# 46# 54# 60# 70# 80# 120# #180 #240 #280 #320 #400 #600 #800 #1000 #1200 #1500 #2000 #3000 W63 W40 W28 W20 W14 W10 W7 W5 Main Applications: Water treatment,blasting,waterjet cutting,lapping on TV on screem,semiconductor,special glass products etc