What is Wollastonite?

Wollastonite is a naturally occurring, calcium metasilicate (CaSiO3) mineral with a needle-like particle shape. It is usually white and can withstand temperatures up to 1540°C.
Geology
Wollastonite is formed when impure limestone or dolostone undergo high temperature and pressure changes sometimes in the presence of silica-bearing fluids as in skarns or contact metamorphic rocks.
Physical properties

- High brightness
- Low moisture and oil absorption
- Low water solubility
- Basicity
- Low volatile content
- High melting point
- Acicular crystal structure
- Relatively high hardness (4.5 on Mohs’ scale)
- Adhesives and Sealants
- Ceramics
- Building Products
- Paint and Coatings
- Plastics
- Rubber
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Adhesives and Sealants
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Ceramics
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Building Products
-
Paint and Coatings
-
Plastics
-
Rubber