Flawless: A model holds up the egg-sized diamond which has sold for a record £19million in auction
Two phone bidders competed for the 118 carat rock from Africa in six minutes of measured bidding until one dropped out at the Sotheby's jewelry auction, part of fall sales of art and collectibles by the firm and its rivals.
The twice-yearly ritual in the southern Chinese city draws wealthy collectors from mainland China and other Asian countries and has made the city one of the world's busiest auction hubs.
Stunning: The stone, which weighed 299 carats when it was found in the rough in 2011, is the largest and most significant such diamond graded by the Gemological Institute of America
That was more than the previous record of $26.7 million for a white diamond, set in May at Christie's in Geneva.