Amrapali Company Mining and refining Anand Company Andhra Phosphate Ltd. China clay Lime, Limestone and Dolomite Rock Phosphate (Apatite), Vermiculite (Associated Mineral) 8. Andhra Pradesh Mineral Development Corp. Ltd. Barytes(lumps/powder), Black granite, Ball clay/washed clay, Rock Phosphate(Apatite) and Vermiculite.