De Beers Hoovers Up Its Best Diamonds From the African Seabed

A supervisor stands on watch as a machine automatically seals diamonds sourced from the seabed in a barcoded tin can aboard the Mafuta diamond mining vessel, operated by Debmarine Namibia, a joint venture between De Beers and the Namibian government, during offshore diamond mining operations in the Atlantic Ocean off the coast of Namibia, on Friday, June 16, 2017. The world's biggest diamond producer has spent $157 million on a state-of-the-art exploration vessel that will scour 6,000 square kilometers (2,300 square miles) of ocean floor for gems, an area about 65 percent bigger than Long Island. Photographer: Simon Dawson/Bloomberg via Getty Images