Blue diamond sells at Christie's for $57.5 million
Oppenheimer Blue' diamond sells for record $57.6 million at auction - ABC7 New York
Oppenheimer blue diamond sells for record $57.5 million | Al Arabiya English
BLUE OPPENHEIMER DIAMOND RING - GEMOLOGUE by Liza Urla
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Oppenheimer Blue' diamond sells for $70 million, setting new record
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The Oppenheimer Blue diamond sets a new world record | The Jewellery Editor
The world's most expensive blue diamond, the Oppenheimer Blue sets a new world record | CNN