The Safdie brothers' frenetic, frantic thriller Uncut Gems revolves around a rare opal that sends Howard Ratner (Adam Sandler) on a dangerous journey through New York City's diamond district. Finding just the right prop sent the film's producer on a similar wild hunt."We had trouble sourcing a real one and trouble figuring out how to get the art department to build what was in our heads," says producer Sebastian Bear-McClard, a longtime collaborator of the Safdies.