the mineral industry of tanzania 2002 28 1 references that include a section mark are found in internet cited by thomas r yager recent years has produced copper gold silver and semimanufactured steel such industrial minerals as calcite diamond other gemstones gypsum phosphate rock salt silica sand soda ash country also coal petroleum products building materials cement gravel limestone deposits cobalt iron ore natural gas nickel titanium occur s gross domestic product gdp at purchasing power parity amounted to 24 2 billion grew 6 3 compared with 2001 5 2000 7 1999 manufacturing accounted for 8 4 construction mining quarrying electricity water international monetary fund 2003 p 180 after increasing 13 value output sector rose 16 from 1997
