FTP, name this mineral whose pure transparent form exhibits double refraction and is therefore used in making polarizing prisms.
Its crystals belong to the rhombohedral class of the of the hexagonal system which differentiates it from aragonite which has the same chemical composition but forms orthorhombic crystals. This mineral which is composed of anhydrous calcium carbonate figures into the production of lime, cement, fertilizers, crayons, and building materials. FTP, name this mineral whose pure transparent form exhibits double refraction and is therefore used in making polarizing prisms.
Its crystals belong to the rhombohedral class of the of the hexagonal system which differentiates it from aragonite which has the same chemical composition but forms orthorhombic crystals.
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