Congolese minerals could be processed in Rwanda, sources sayEastern Congo rich in tin, tantalum and tungstenCongo, U.N., US have accused Rwanda of exploiting Congolese mineralsBy Sonia Rolley and Daphne PsaledakisMay 19 (Reuters) - Congolese minerals such as tungsten, tantalum and tin, which Kinshasa has long accused neighbouring Rwanda of illegally…...