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Wollastonite


Mineral Properties and Uses



Physical Properties of Wollastonite

Chemical Classification silicate
Color white, gray, pale green, colorless
Streak white
Luster vitreous
Diaphaneity subtransparent to translucent
Cleavage three directions of cleavage, perfect
Mohs Hardness 4.5 to 5.5
Specific Gravity 2.8 to 3.1
Diagnostic Properties color, cleavage
Chemical Composition Calcium silicate, CaSiO3
Crystal System triclinic
Uses asbestos, siding, roofing tile, ceramics


Wollastonite with garnet
Wollastonite with garnet from Willsboro, New York. Specimen is approximately 4 inches (10 centimeters) across.



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Wollastonite
Wollastonite with garnet from Willsboro, New York. Specimen is approximately 4 inches (10 centimeters) across.




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