(IDEX Online) - Nothing Lasts Forever, the new documentary that claims to lift the lid on the "highly secretive" diamond industry, premiered yesterday on the US network Showtime.The trailer opens with a provocative observation about lag growns: "People want diamonds because they've been told to. None of them are really worth anything and, surprise, your big diamond might be fake!"Jason Kohn spent 10 years on the 87-minute movie and interviewed "some of the most colorful and powerful industry insiders" - including Dusan Simic, Aja Raden, Martin Rapaport, Stephen Lussier and Chandu Sheta."Can you tell the real thing from a fake?" asks Showtime's publicity material for the movie."What if the difference no longer matters? The De Beers diamond cartel cornered the market on eternal love with 'A diamond is forever,' but now a wave of undetectable synthetic diamonds has flooded global gem markets, threatening to expose the artifice that props up a multi-billion dollar industry. "Interviewing diamond merchants, De Beers executives, auctioneers, gemologists, designers, investigators and scientists, this film explores one of the most beautiful lies ever told."Producers Kilo Films says Kohn "infiltrates this highly secretive world, he uncovers a vast, far-reaching crime that threatens the value of every diamond ever mined. Hidden from public view, a war is raging inside the diamond industry."Screengrab from Nothing Lasts Forever trailer