A diamond necklace is displayed at a news conference in Beijing, Dec. 06, 2011. Zbird, an online store of diamond accessories released its new products Tuesday.(Xinhua/Zhang Chuanqi)

A diamond necklace is displayed at a news conference in Beijing, Dec. 6, 2011. Zbird, an online store of diamond accessories released its new products Tuesday.(Xinhua/Zhang Chuanqi)