Date: 2004
The Score: 11.5 million Euros ($15.2 million) in diamonds

There might have been only two diamonds stolen during the Louvre diamond heist, but the estimated value of both reached in the millions. Lack of security allowed thieves to swipe the diamonds when guards left the gems unguarded for 15 minutes. That was more than enough time steal a 47-carat diamond and 30-carat stone.

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