A kind of water containing magnesium aluminum silicate secondary metamorphic minerals as the main component of non metallic mineral. The main mineral is a genus of vermiculite, mica minerals. General boundary grade (including vermiculite )10%, industrial grade15%. For open pit mining. The commonly used hand selection, screening and fanning dressing, is also useful for flotation and electric elected.Used for rubber, plastic filler, fertilizer carrier, a catalyst for organic compound and pesticide, disinfectant and other raw materials. Also widely used in building materials, metallurgy, textile, machinery, electric power, petroleum, food, environmental protection and transport sectors.