Mica usually show false six-party or diamond plate, sheet, columnar crystal shape. Colors vary with the change of the chemical composition, the main along with the increase of Fe content and darker. Are the characteristics of mica insulation, high temperature resistant, luster, physical and chemical performance is stable, has a good thermal insulation, elasticity and toughness, and have been stripped into the performance of the flexible transparent sheet. In industry with the most is white mica, mica followed by gold. Its widely used in the industries of building material industry, fire fighting, fire extinguishing agent, welding electrode, plastic, electrical insulating paper, paper making, asphalt, rubber, pearl pigment chemical industry, etc