The world's most expensive blue diamond, the Oppenheimer Blue sets a new world record - CNN Style
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The world's most expensive blue diamond, the Oppenheimer Blue sets a new world record - CNN Style
Blue diamond engagement rings: the rarest of them all | The Jewellery Editor
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Rare 15-Carat Blue Diamond Sells For $57.5 Million—Barely Under World Record
TOP 10 | Most Beautiful and Expensive Blue Diamond in the World - YouTube
The Blue Moon Diamond - The Most Expensive Diamond in the World! | Naturally Colored
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The 10 Most Expensive Blue Diamonds | Worthy.com
