【Geneva, Swit】Rare Blue Diamond Fetches Over $21.5 Million at Swiss Auction

Editor’s Note

A rare blue diamond dubbed the ‘Mediterranean Blue’ has sold for a record $21.5 million at a Sotheby’s auction in Geneva, underscoring the enduring allure and immense value of the world’s most exceptional gemstones.

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Record-Breaking Sale

A very rare blue diamond was sold for $21.5 million (approximately 3.14 billion yen) at an auction held in Geneva, Switzerland, on the night of the 14th, Sotheby’s, the auction house, announced.

The ‘Mediterranean Blue’

Named “The Mediterranean Blue,” this fancy vivid blue diamond weighs 10.3 carats. Its pre-sale estimate was $20 million (approximately 2.92 billion yen).

希少なブルーダイヤ、31億円超で落札 スイス
Anonymous Buyer

The winning bidder was a private collector from the United States, whose name was not disclosed.

Origin and Hype

“The Mediterranean Blue” is a new blue diamond recently mined from the renowned Cullinan mine in South Africa and has been a major focus of attention within the industry since its announcement in March.

希少なブルーダイヤ、31億円超で落札 スイス
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⏰ Published on: May 15, 2025