Garnet abrasives are suitable for many materials and have a wide range of applications, which are favored by users. garnet sand has very good characteristics as an abrasive. Because of its high hardness, garnet sand is also called natural emery. The hardness can reach 8. It can be used more times during sandblasting and can reduce the economic cost of use. Garnet sand presents a polyhedron, with more sharp corners, and thus has a higher efficiency in sandblasting. Moreover, the same effect of garnet sand treatment can save one-third of the sand.