Photo taken on May 8, 2012 shows jade eardrops displayed at a preview of Christie's auction in Hong Kong, south China. Christie's Hong Kong will hold a Spring Sale on May 29, 2012 with more than 300 lots on offer and a total estimate exceeding 600 million HK dollars (about 77.3 million US dollars). (Xinhua/Jin Yi)

A model shows diamond jewelry during a preview of Christie's auction in Hong Kong, south China, May 8, 2012. Christie's Hong Kong will hold a Spring Sale on May 29, 2012 with more than 300 lots on offer and a total estimate exceeding 600 million HK dollars (about 77.3 million US dollars). (Xinhua/Jin Yi)

Photo taken on May 8, 2012 shows a red gem necklace displayed at a preview of Christie's auction in Hong Kong, south China. Christie's Hong Kong will hold a Spring Sale on May 29, 2012 with more than 300 lots on offer and a total estimate exceeding 600 million HK dollars (about 77.3 million US dollars). (Xinhua/Jin Yi)

A model shows jade and gem jewelry during a preview of Christie's auction in Hong Kong, south China, May 8, 2012. Christie's Hong Kong will hold a Spring Sale on May 29, 2012 with more than 300 lots on offer and a total estimate exceeding 600 million HK dollars (about 77.3 million US dollars). (Xinhua/Jin Yi)

Photos taken on May 8, 2012 show a preview of Christie's auction in Hong Kong, south China.

Christie's Hong Kong will hold a Spring Sale on May 29, 2012 with more than 300 lots on offer and a total estimate exceeding 600 million HK dollars (about 77.3 million US dollars).