Rare Blue Diamond Sells for Record- A flawless vivid blue diamond weighing 7.03 carats sold Tuesday for a record $9.49 million, the highest price paid per carat for any gemstone at auction, Sotheby's said. This rare 7.03-carat blue diamond fetched a record $9.49 million when it was auctioned off in Geneva on Tuesday. Sotheby's said it was the highest price ever paid for a gem of its kind. The flawless item was unearthed last year at the historic Cullinan mine in South Africa.

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