Limestone is a hard rock with dense surface owing to its calcareous nature. This sedimentary rock is mainly composed of various crystal forms of Calcium Carbonate (CaCO3) and is quite versatile. It is water and frost resistant, non-slippery and fire-proof. It is one of the most homogenous natural rocks found on Earth’s surface.

This stone finds wide application in many popular architecture and landmarks around the world. This stone is considered ideal for architectural purposes as it has the properties of high resistance in freezing and thawing conditions that make it extremely useful.

Limestone is classified as an organic sedimentary rock because it contains dead organisms. When exposed to extreme heat and pressure, limestone transforms into metamorphic marble rock. Limestone is used to neutralise acids. Some limestones are formed by the cementation of sand or mud with calcite (clastic limestone) and have the appearance of sandstone or mudstone.