Vietnam has a variety of mineral resources. Located beneath the subsoil are precious stones, coal and valuable minerals such as tin, zinc, silver, gold and antimony.   Vietnam also has large deposits of oil and gas on its offshore islands and on the mainland. Vietnam also has abundant subterranean mineral water sources. These are found at Quang Hanh in Quang Ninh, Hoi Van in Binh Dinh, Vinh Hao in Binh Thuan, Duc My in Nha Trang, Kim Boi in Hoa Binh, and Binh Chau in Ba Ria -Vung Tau.