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The Bleu Royal, One of the Most Expensive Diamonds Ever Sold? the Rare, Historic Blue Gem Could Fetch Millions at Christie’s Auction, Which Also Features Pieces Worn by Audrey Hepburn and Marlon Brando

By Marcus Vance

• Oct 8, 2026 • 3 min read

The Bleu Royal, One of the Most Expensive Diamonds Ever Sold? the Rare, Historic Blue Gem Could Fetch Millions at Christie’s Auction, Which Also Features Pieces Worn by Audrey Hepburn and Marlon Brando

Direct Answer • Key Takeaway

The Stone Is Expected to Fetch Us$35 Million to Us$50 Million in Christie’s Magnificent Jewels Auction.

Marcus Vance

Cybersecurity & Digital Privacy Researcher

Marcus Vance is a cybersecurity auditor and technology writer dedicated to educating the public about online safety, data privacy regulations, enterprise security, and emerging cyber threats.

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