Wollastonite (CaSiO3) that may contain small amounts of iron, magnesium, and manganese substituting for calcium. It is usually white. It forms when impure limestone or dolomite is subjected to high temperature and pressure, which sometimes occurs in the presence of silica-bearing fluids as in skarns or in contact with metamorphic rocks. It is named after the English chemist and mineralogist William Hyde Wollaston (1766–1828).

Based on the versatility of the needle-like shape, low gloss, paint film strength and overall durability can be achieved