A model displays a 30.16-karat diamond ring during a press conference of Tiancheng International in Hong Kong, south China, Nov. 25, 2016. Tiancheng International will hold an jewellery and jadeite auction event on Dec. 4 for more than 270 items with estimated value exceeding 2 billion Hong Kong dollars (about 258 million U.S. dollars). (Xinhua/Lui Siu Wai)
