Was it an inside job? Who had the knowledge and audacity to swipe so many gems from Antwerp’s Diamond Centre? 123 of 160 vaults were cleaned out. Ten years ago, five vaults were robbed for an estimated loss of $4.55 million. According to this article on a foiled theft of the diamonds in London’s Millennium Dome, “the Guinness Book of Records says the world’s largest gem theft was carried out in August 1994 by three men who stole items valued at $43 million from a jewelry shop in the Carlton Hotel in Cannes, France.” Does the record still stand? A group of diamond merchants in Belgium are hoping so.