A model presents a 5.03-carat green diamond ring at a media preview of Christie's Hong Kong 2016 Spring Auction in Hong Kong, South China, May 4, 2016. A media preview of Christie's Hong Kong 2016 Spring Auction was held on Wednesday, with fascinating works of art on display. The auction will be held from May 27 to June 1 in Hong Kong. [Photo/Xinhua]
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