coltan in sierra leone
Gombu Koko - Trading & Mining of Coltan Sierra Leone West AfricaEnvironmentally aware mining and trading company that is the leading exporter of Coltan in Africa.coltan in sierra leone,Sierra Leone - African MINERALSJun 8, 2013 . elements such as columbite – tantalite (coltan). Sierra Leone's Agenda for Prosperity identi- fies development of the minerals sector as a.Sierra Leone News: 'Minerals sector is growing'- NMA DG « Awoko .Jul 11, 2014 . He said Sierra Leone is richly endowed with mineral resources such as, . and rare earth elements such as columbite tantalite (coltan), and the.