Wollastonite is a calcium inosilicate mineral (CaSiO3) that may contain small amounts of iron, magnesium, and manganese substituting for calcium. Wollastonite is a natural mineral with many unique characteristics. it has become one of the most widely used functional fillers. Wollastonite can improve the performance of products, such as plastics, paints and coatings, building materials, friction, ceramics, and metallurgical industry.