A Fistful of Diamonds — John B. Robinson

Fast-talking gem expert Lonny Cushman encounters the dangerous and malevolent world of the African gem industry as he accompanies a young female seminarian from New York to Rwanda in search of her missing father. Once they reach Africa, Lonny chases a collection of flawless green diamonds through the killing fields of the Congo. Their survival depends upon negotiating the bloody network of the conflict-ridden African diamond trade, including Islamic jihadists, corrupt military officers, Israeli agents, Ukrainian arms dealers, and a whole host of con men. Can Lonny save himself and the young seminarian from a tragic demise?