De Beers Hoovers Up Its Best Diamonds From the African Seabed

Tailings from open pit diamond mines once operated by De Beers sit along the shoreline of the Atlantic Ocean on the Skeleton Coast 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