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A sign for the London Metal Exchange (LME) on a wall by the new Ring, the open trading floor of the LME following its relocation in central London, on Feb. 18, 2016. Leon Neal/AFP via Getty Images
The London Metal Exchange (LME) on March 17 revealed that the bags of nickel stored in its licensed warehouse contained stones. The LME is supposedly the most trusted and secure minerals trading platform; however, it has had its share of trouble with nickel.