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7. Bvlgari Two-Stone Diamond Ring—$15.7 million
Created in 1972, from the Bvlgari collection, an Asian representative bought the ring in its original black silk box for $15.7 million after quite an intense bidding war at the October 2010 auction. The ring has two triangular diamonds, one is a vivid blue that weighs 10.95 carats and the other is a 9.87 colorless diamond. The GIA has authenticated and verified the color, clarity, rarity, and flawlessness of the ring. It is an original from the Bvlgari collection, the company’s luxurious lines of vintage and estate jewelry make a Bvlgari purchase a very good investment.