Recently, an extremely rare 5.30-carat, fancy deep-blue diamond was sold in London for $9.5 million (GPB 6.2 million) or $1.8 million per carat . According to the auction house, bids from all over the world came through just 25 telephone lines as well as those from a packed sales room.


The ring went to bid with a high presale estimate of $2.3 million. Made by Bulgari in 1965, the ring is a cushion-shaped blue diamond, set horizontally with a mount pave-set with brilliant-cut diamonds and course of baguette-cut diamonds in a Trombino ring.


The seller stated, “We are delighted with the price it has made. It was a sensational stone which charmed everyone who viewed it prior to the sale. Blue diamonds, especially those over 5.00 carats, are extremely rare to see on the market and continue to be highly sought-after. We are honored to have handled the sale of such a unique gem.”