The mica belongs to the aluminum silicon sour salt mineral, having a continuous layer the form silicon oxygen tetrahedron structure. The mica is divided into three second clans:Muscovite, biotite and lithium mica.White mica including white mica and rare paragonite; Black mica including bronze mica, black mica, iron mica and manganese black mica; The lithium mica richly contains the potassium oxide each kind of mica tiny lamella.My factory (Yanxi Minerals Co.,Ltd) main production processing white mica, bronze mica, black mica.