Krishna Sai Granites (KSG) Group of Andhra Pradesh, South India, began quarrying Black Galaxy granite in 1992. Today, it has become a large producer of the material, with six quarries in the village of 20 years ago, Krishna Sai Granites (KSG) Group was founded by Venkateswara Rao Sidda, who worked diligently to develop numerous quarries particularly several for Black ...