Muscovite Mica is an important rock-forming mineral present in igneous,metamorphic, and sedimentary rocks. As a natural silica,Muscovite Mica is a very special functional filler due to its high lamellar structure and purity. Muscovite Mica is chemically inert, resistant to most acids and oxidation, insoluble in water and has a high temperature resistance. It also shows excellent electrical insulation performance.