Kota Stone is a fine-grained variety of limestone, quarried at Kota district, Rajasthan, India. Hundreds of mines are located in or near the town of Ramganj Mandi and in the Kota district. The greenish-blue and brown colours of this stone contribute to its popularity. Other colors are black, pink, grey, and beige. When used for building, the stone is mainly used for exteriors, but will also work when used for interiors..