During the 19th century it seemed like the American West held endless possibilities for great wealth, and Americans were looking for that next big thing. Two Kentucky swindlers, taking advantage of gemstone fever, lured some of the country's biggest bankers and businnessmen -- and the founder of Tiffany & Co. -- into a jewel con with claims of having discovered a large deposit of diamonds. The value of their diamond mine would have exceeded $86 million in today's money. If it had been real.

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