Plg minerals offers high quality manakpur limestone in the market. Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (caco3). It generally contains some magnesium carbonate as a secondary component. Like most others sedimentary rocks, limestone is composed of grains. Limestone is found in many forms and is classified in terms of its origin, chemical composition, structure and geological formation.