Quartzite is a metamorphic rock formed by alteration of sandstone by heat and pressure. Metamorphism activity crystallizes sand grains and silicon dioxide, making it tough and durable rock. Quartzite found in many colours and patterns, can be used in wall cladding, exterior, interior flooring, bathroom tiles. It differs from sandstone by the mode of fracture. Quartzite breaks into flat surface, so used as dimension stone in construction. Pure quartzite is white to grey in colour. Impurities in quartzite result in variety of colours based on the type of impurities. This extreme tough stone has a rating of 7 in Mohs hardness test.