When Private Collections Speak: Bonhams Exceptional Jewels, London
Six single-owner collections converge at Bonhams London on 11 June 2026, led by a century-hidden Boucheron tiara and Dame Nellie Melba’s Cartier sautoir. Provenance is the story.
Six single-owner collections converge at Bonhams London on 11 June 2026, led by a century-hidden Boucheron tiara and Dame Nellie Melba’s Cartier sautoir. Provenance is the story.
The Ocean Dream — a 5.50-carat Fancy Vivid Blue-Green diamond without peer in gemological history — resurfaces at Christie’s Geneva after twelve years in private hands.
Why do Kashmir sapphires command record prices at auction? Their legendary history, velvety blue, and why a lab certificate changes everything.
Cartier’s Kashmir blue takes the lead in a Rockefeller group at Christie’s New York on 10 December 2025: a 17.66-carat unheated Kashmir sapphire ring, an Art Deco emerald bracelet, Raymond Yard parrots, and a 1950s Cartier watch—where provenance and design excellence meet in a resonant constellation.
Three jewels of imperial provenance take centre stage at Sotheby’s Royal & Noble Jewels Sale in Geneva: Napoleon’s diamond brooch seized at Waterloo, Cunegonde of Saxony’s pearl Sévigné, and Princess Neslishah Sultan’s pink diamond ring — each a reflection of history’s splendour and legacy.
A masterpiece of nature and craftsmanship, The Glowing Rose—a 10.08-carat Fancy Vivid Pink diamond of exceptional clarity and purity—will take centre stage at Sotheby’s Geneva on 12 November. Set in a bespoke Boodles mount, this extraordinary gem stands among the rarest ever to appear at auction, expected to achieve around $20 million.
Step into the world of Gilded Age elegance as Phillips brings the Vanderbilt Family Jewels to Geneva this November. Featuring Tiffany & Co. and Cartier masterpieces once owned by Gladys Moore Vanderbilt, this historic collection celebrates the artistry and legacy of one of America’s most influential dynasties.
The Mellon Blue, a 9.51-carat Fancy Vivid Blue diamond of Internally Flawless clarity, will star at Christie’s Geneva in November. In an exclusive Q&A, Rahul Kadakia places it among the world’s most exceptional gems.
Phillips Geneva brings brilliance to the block — rare diamonds, iconic maisons, and collectable stones that speak to taste and value.
A necklace fit for Royalty at Christie’s upcoming Magnificent Jewels Auction in Geneva.









