A rock consisting chiefly of calcium carbonate or carbonate of lime. It sometimes contains also magnesium carbonate, and is then called magnesian or dolomitic limestone. Crystalline limestone is called marble. Hydrated lime & quick lime one part of lime stone powder.
Use of lime stone powder: - It finds use in ceramics, glass, wire, paper sugar, petroleum, rubber, textile, paint, mortar, cement industries, dairy, food, transparent variety and other many use.