... refractory uses. High Hardness The high content of Al2O3 (Aluminum Oxide) makes it to be with very high hardness (Mosh ... ,cutting, lapping, sandblasting, polishing, surface preparing and also for coated abrasive application, including sandpaper and sand belt.It’s not easy ... for cutting wheels, grinding wheels etc, also used for coated abrasives applications like sandpapers. It’s white color and little ...