Water cutting garnet The garnet, mixed with water, will form a water knife which, when mixed with sand and at high velocity and pressure, is capable of slicing into various soft packaging materials and hard materials such as metal, stone and glass. The garnet stones have uniform size and excellent cutting properties, which reduce equipment damage to the minimum extent and save costs. Water cutting has become one of the major applications of garnet. Specification of 80# is widely used in Asia (especially Korea) and South America.