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Oppenheimer Blue' Diamond Sells at Auction for $57.5 Million
The world's most expensive blue diamond, the Oppenheimer Blue sets a new world record - CNN Style
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These are 12 of the most expensive diamonds in the world
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The most expensive ring in the world | Blue diamond, Blue diamond ring, Most expensive ring
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14.6-Carat Blue Diamond Is Most Expensive Jewel Ever Sold at Auction | Fortune
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The world's most expensive blue diamond, the Oppenheimer Blue sets a new world record - CNN Style
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