Blue diamond sold for $7.98M ($1.32M per carat)

At a Sothby’s auction in Hong Kong, a flawless 6.04 carat blue diamond has been sold for $7.98 million making it the world’s most expensive gem stone per carat. Sothby’s spokesman said the diamond which was sold for $1.3 million per carat broke the previous record by a red diamond, the Hancock Red which went for around $900000 per carat in 1987. The diamond was bought by Moussaieff Jewellers to add to their already large collection of rare gemstone.