The stunning 9.75 carat, pear-shaped diamond was bought by a Hong Kong private collector after 20 minutes of competitive bidding on Thursday evening, Sotheby’s said on Friday. The price also set a new world auction record for price-per-carat for any diamond, the auctioneers said. The jewel had been owned by Rachel Lambert otherwise known as … Continue reading BLUE DIAMOND SELLS FOR RECORD $US32.6 MILLION