Wollastonite is a naturally occurring mineral which is a chemical combination of Calcium, Silicon and Oxygen. Wollastonite is formed when limestone or other high-calcium rocks undergo high temperature and pressure changes sometimes in the presence of silica-bearing fluids such as in skarns or contact metamorphic rocks.
This highly versatile mineral is characterized by its high whiteness, unique needle-like, or ‘acicular’, structure, high brightness, low moisture and oil absorption, and high heat stability.
- High brightness
- Low moisture and oil absorption
- Low water solubility
- High pH
- Low volatile content
- High melting point
- Medium hardness (4.5 on Mohs’ scale)
- Thermal stability