طحن مسحوق ولاستونيت
Introduction to wollastonite Wollastonite is a triclinic, thin plate-like crystal, aggregates were radial or fibrous. The color is white, sometimes with light gray, light red color with glass luster, cleavage surface with pearl luster. Hardness is 4.5 to 5.5; density is 2.75 to