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The Okavango Blue Diamond: A Miracle of Nature and Science
The Okavango Blue Diamond, a dazzling 20.46-carat stone, is more than just a beautiful jewel-it's practically a miracle of ...
Robb Report1mon
This 5.7-Carat Blue Diamond Ring Could Fetch a Cool $8 Million at Auction
Other singular standouts include a 20.1-carat diamond ring (estimated at up to $1.2 million), a pair of Harry Winston spinel and diamond earrings ($400,000 to $600,000), and an Art Deco sapphire ...