De Beers Consolidated Mines has successfully managed the global diamond industry for many decades, propping up prices at all stages of the value chain, reducing price volatility and increasing consumer demand. By the end of the 20th century, however, a series of forces threatened De Beer's role and profitability. New diamond mining firms were selling their production on the open market rather than through De Beers' Central Selling Organization. Can De Beers strategy beat their competitors and what was the competition situation? Find out, more in this presentation.