Wollastonite

CaSiO3

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Wollastonite is a calcium inosilicate mineral that typically forms in contact metamorphosed limestones. It is used industrially as a ceramic raw material and filler in plastics and paint, valued for its bright white color and needle-like crystal shape.

Crystal System Triclinic
Mineral Class 09 Silicates
Mohs Hardness 4.5-5.0
Specific Gravity 2.86-3.09
Color White, gray, very pale green
Luster Vitreous
Streak White
Cleavage Perfect {100}
Fracture Uneven
Transparency Translucent
Crystal Habit Prismatic, fibrous, massive

Mohs Hardness

Mohs Hardness: 4.5 – 5.0
1 Soft10 Hard

Crystal System

Triclinic

Frequently Asked Questions

What is the hardness of Wollastonite?
Wollastonite has a Mohs hardness of 4.5-5.0.
What crystal system does Wollastonite belong to?
Wollastonite crystallizes in the Triclinic crystal system.
What color is Wollastonite?
Wollastonite is typically White, gray, very pale green.
What type of luster does Wollastonite have?
Wollastonite exhibits a Vitreous luster.
What is the chemical formula of Wollastonite?
The chemical formula of Wollastonite is CaSiO3.