Limestone is basically sedimentary rock composed of the mineral calcite (CaCO3). This stone is especially popular in architecture, and many landmarks around the world. It is widely used as tiles, slabs in flooring, wall cladding, vanity tops and to pave the floors of large commercial complexes, hospitals, airports, shopping malls, railway stations, parks etc. Properties such as high resistance in freezing and thawing conditions make natural limestone an ideal for architectural purposes.