It takes perhaps a billion years to make a diamond, and just 87 minutes to shatter so many of the misconceptions audiences have about them in “Nothing Lasts Forever.” Make that eight minutes. That’s roughly the point at which jewelry designer (and “Stone” author) Aja Raden — the only woman interviewed in Jason Kohn’s wild, decade-long delve into the secretive world of the diamond industry — offers up this gem: “The truth about diamonds is: They’re all exactly the same, and none of them are really worth anything.”
For some, that revelation could hit with the force of being told there’s no Santa Claus, even though it’s been an open secret for ages. Most audiences probably already have some inkling of how the De Beers diamond cartel took a not-particularly-rare stone and infused it with value by cornering the market, stockpiling most of the world’s supply and controlling the release at such a rate as to set the price.