Africa’s diamond wars took four million lives. Blood on the Stone tells the story of how diamonds came to be so dangerous, describing the great diamond cartel and a dangerous pipeline leading from war-torn Africa to the glittering showrooms of Paris, London and New York. It describes the campaign that forced an industry and more than 50 governments to create a global control mechanism, and it provides a sobering prognosis on its future...For the past ten years [the author Ian Smillie's] career has focused on blood diamonds, the wars they fuelled and a scheme designed to stop them.