- Chemical Name:Calcium Metasilicate
- Functions:Filler
- CAS Number:13983-17-0
- Chemical Family:Silicates
- Synonyms:Monocalcium Silicate
Wollastonite is a calcium inosilicate mineral (CaSiO₃) with a theoretical makeup of approximately 48% calcium oxide and 52% silicon dioxide. Wollastonite is usually white in color. It may contain small amounts of iron, magnesium, and manganese which can give it a gray, red, or brown tint. Wollastonite is an industrially important mineral. It is well known for its good fluorescence. It also has low moisture and absorption properties.