Minerals Industrial minerals found in Tanzania include gemstones, soda ash, gypsum, salt, phosphate, gravel, sand, dimension stones, and lately graphite. The domestic demand for salt was nearly 120,000 t/yr. Tanzania’s salt production declined by 19.3% from 1996 to 2000 . Domestic salt producers included H.J. Stanley & Sons Ltd, Mtawanya Saltworks Ltd, Mtwara Oceanic Products Ltd., and Nyanza Salt Mines (T) Ltd. The International Cement Review (2001, p. 286) predicted that cement consumption would grow by nearly 8% in 2001, which may lead to higher demand for domestic gypsum and limestone.