The Gemological Institute of America’s grading lab is suspending its diamond sealing service for the second time in six years, after a likely fraudster replaced untreated diamonds in a sealed packet with treated stones. The suspension, which is effective immediately, stems from the lab’s discovery that an unspecified “small number” of its sealed packets had been compromised after they left GIA. According to…

Swiss fine jewelry brand de Grisogono has allegedly been a part of a complicated, long-running money-laundering scheme that’s redirected Angolan government funds into shell companies owned by one family. According to the International Consortium of Investigative Journalists, which shared more than 700,000 supporting documents it obtained with The New York Times, Isabel dos Santos—Africa’s richest woman and the daughter of…