Application: With its high strength, high hardness, high wear resistance, large specific gravity, small size, heat and corrosion resistant and pollution free, the product is widely used in precision processing and deep processing of various ceramics, enamels, glasses and thick and hard materials in chemical factories, as grinding media for fine crushing machines like ball mills, can-type mills and vibration mills, with significantly higher crushing and milling efficiency and wear resistance than common ball stone or natural cobblestone.