Limestone

Limestone, CaCO₃ (calcium carbonate) is present in large quantities in  the Earth's crust around the world. It is a sedimentary rock composed of the mineral calcite. It can be processed into a crushed, granulated, ground or milled product. 

Some of the applications of limestone include agriculture, garden lime, lake and wetland liming, as well as the production of paper, paint, glass, asphalt, bricks, concrete and metals.