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[108] 99% of the gold, silver and copper was donated by Rio Tinto from a mine in Salt Lake County, Utah in the U.S. [109] The remaining 1% came from a Mongolian mine. [110] Each medal weighs 375–400 g (13.2–14.1 oz), has a diameter of 85 mm (3.3 in) and is 7 mm (0.28 in) thick, with the sport and discipline engraved on the rim. [ 111 ]