the mineral industry of tanzania 2001 28 1 by thomas r yager in recent years has produced gold iron ore and steel such industrial minerals as bentonite kaolin other clays calcite diamond gemstones graphite gypsum phosphate rock salt silica sand soda ash country also coal petroleum products building materials cement gravel limestone deposits cobalt copper natural gas nickel titanium are known to occur s gross domestic product gdp at purchasing power parity amounted 22 3 billion per capita was about 650 market exchange rates 9 grew 5 6 compared with 2000 1999 7 1998 manufacturing accounted for construction mining quarrying 2 electricity water international monetary fund 2002 p 174 2003 101 2002a c after increasing 13 value output
