Mbuji-Mayi, Congo - Man working at MIBA is investigating a diamond in the Congolese city of Mbuji-Mayi, famous for its diamonds. The city was founded in 1910 as a diamond recycling station by Belgian colonialists. The substrate around Mbuji-Mayi is rich in minerals. The wide range of commodities is one of the many reasons for unrest and war in the Congo. The area around Mbuji-Mayi is one of the richest sources of mineral wealth in the world. Diamond buyers in the Congolese city Mbuji-Mayi decorate their fa??ade with bright beautiful paintings to attract diamond diggers. Societ?? mini??re de Bakwanga (abbreviated MIBA) is a diamond mining company based in the Democratic Republic of the Congo.