Tanzania Mining - TanzaniaInvestMinerals export accounted for USD 1.37bn of the total value of Tanzania's export in . where several large deposits have already been discovered and are being.discovering a valuable mineral,New technology for recovering valuable minerals from waste rock .Oct 26, 2011 . Researchers report discovery of a completely new technology for more . gold, silver, copper, and other valuable materials from rock and ore.
discovering a valuable mineral