Is Wollastonite a calcium inosilicate mineral?

Wollastonite is a calcium inosilicate mineral that contains small amounts of iron, magnesium, and manganese in place of calcium. It is usually white. It is formed by the metamorphism of impure limestone or dolomite under high temperature and pressure. This type of metamorphism sometimes occurs with silicon-containing fluids such as skarn, or during contact metamorphism. Associated minerals of wollastonite include garnet, vesuite, diopside, tremolite, epidote, plagioclase, pyroxene, and calcite. Wollastonite is a single-chain silicate mineral and is the main mineral component of skarn. It belongs to the triclinic crystal system and is usually in the form of flake, radial or fibrous aggregates. Its color is white with gray tinges. It has a glassy sheen like that of a pearl.

Its hardness is 4.5~5.0. Useful properties of wollastonite are its high brightness and white color, low moisture and oil absorption, and low volatile content. Wollastonite is mainly used in papermaking, ceramics, cement, rubber, friction products (brakes and clutches), metallurgical fluxes, thermal insulation materials, metal manufacturing, paint fillers and plastics.