More and more labs are using artificial intelligence and automated grading to evaluate diamonds. Some think that will change the industry. When the De Beers Institute of Diamonds, the diamond giant’s grading lab, first started using machines to judge color, researchers were surprised by the machines’ results and how they stacked up against their human counterparts. “We immediately spotted there was something different about the color machine,” says David Fisher, principal scientist for De Beers Group Ignite, the miner’s innovation arm. “It was outperforming the human graders in