Almadine Garnet 30/60 mesh , use for : sand blasing , abrasive hight purity, 1. The ... . The usual size are 10-20mesh, 20-30mesh, 20-40mesh, 30- 60mesh, 60grit, 80grit, 120grit, 0.25-3.35mm, 45mesh- 230mesh ... -40.0% Al2O3: 16.0-22.0% FeO: 22.0-27.0% Fe2O3: 4.0-6.0% MnO: 0-2.0 ...