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The combo photo taken on July 16, 2019 shows the two sides of a gold coin in front of the New York Stock Exchange in New York, the United States. The colossal one tonne gold coin was displayed here on Tuesday to mark the official launch of the Perth Mint Physical Gold Exchange Traded Fund. The 99.99% pure gold coin measures some 80cm wide and more than 12cm deep. (Xinhua/Wang Ying)