A visitor passes by diamond displayed during the 30th Hong Kong International Jewellery Show in Hong Kong, south China, March 5, 2013. The jewellery show held by Hong Kong Trade Development Council kicked off on Tuesday. More than 3,300 jewelers from 49 countries and regions attended the show.[Xinhua/Lui Siu Wai]

A customer checks diamond during the 30th Hong Kong International Jewellery Show in Hong Kong, south China, March 5, 2013. The jewellery show held by Hong Kong Trade Development Council kicked off on Tuesday. More than 3,300 jewelers from 49 countries and regions attended the show.[Xinhua/Lui Siu Wai] 

Visitors wait to enter the 30th Hong Kong International Jewellery Show in Hong Kong, south China, March 5, 2013. The jewellery show held by Hong Kong Trade Development Council kicked off on Tuesday. More than 3,300 jewelers from 49 countries and regions attended the show.[Xinhua/Lui Siu Wai] 

A visitor passes by a poster during the 30th Hong Kong International Jewellery Show in Hong Kong, south China, March 5, 2013. The jewellery show held by Hong Kong Trade Development Council kicked off on Tuesday. More than 3,300 jewelers from 49 countries and regions attended the show.[Xinhua/Lui Siu Wai]