Limestone is a sedimentary rock primarily composed of calcium carbonate (calcite, CaCO3). Limestone is typically formed in warm shallow waters through chemical precipitation or accumulation of calcareous organic debris, followed by cementation. Uses for limestone are widespread, most notably is lime production. Lime is extremely versatile, it has environmental, metallurgical, manufacturing, construction, and processing applications. Increasing demand for lime and limestone is driven most notably by the construction sector.