The $9.5 million blue diamond source: http://news.yahoo.com This rarest rectangular-shape blue diamond is the most expensive to enter the international market, priced at 10.5 million Swiss francs ($9.49 million) for 7.03 carats. This is highest payment for every carat.
The diamond was the center piece in the semi-annual sale in Geneva conducted by David Bennett, chairman of Sotheby's jewelry department in Europe and the Middle East.
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