Rare ‘Mellon Blue’ Diamond Expected to Fetch Up to $30 Million at Auction

Editor’s Note

The upcoming auction of the ‘Mellon Blue’ diamond, with an estimated value of $30 million, underscores the enduring allure and high-stakes nature of the rare gemstone market. This event highlights significant trends in luxury asset valuation and collector demand.

Auction Highlights

The rare ‘Mellon Blue’ diamond, a Fancy Vivid Blue stone, is set to be auctioned with an estimated value of up to $30 million. This exceptional gemstone represents a significant event in the high-end diamond market.

Market Context

The auction of such a notable diamond is closely watched by industry experts and collectors, as it serves as a key indicator of current trends and values within the luxury gemstone and investment market.

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⏰ Published on: November 16, 2025