Each November, Geneva becomes the centre of the global jewellery market — and Sotheby’s 2025 High Jewellery and Royal & Noble Jewels auctions are once again setting dazzling new standards. From record-breaking natural diamonds to royal heirlooms, this year’s event proves why collectors, investors, and jewellery enthusiasts continue to turn to Geneva for some of the most valuable treasures on Earth.

Leading the auction is The Glowing Rose, a magnificent 10.08-carat Fancy Vivid Pink diamond valued at around USD 20 million. With its rare “pure pink” hue and exceptional clarity, this natural diamond stands among the world’s most precious gems. Only a handful of stones like it exist, comparable to the legendary Williamson Pink Star and Pink Legacy. Its geological formation — caused by atomic distortion rather than impurities — gives it the breathtaking colour that makes pink diamonds so highly sought after.

Colour takes centre stage across the Geneva auction. A pair of Fancy Vivid Yellow diamond earrings weighing 38.66 and 38.88 carats are expected to sell for between CHF 2 million and 3.8 million, while a 4.50-carat Fancy Vivid Blue diamond, internally flawless, could fetch up to CHF 5.8 million. These extraordinary stones highlight the ongoing strength of demand for rare coloured diamonds — a trend that continues to influence the global market for natural gems.

Other highlights include a 7.69-carat “Royal Blue” Kashmir sapphire set by Van Cleef & Arpels, known for its velvety glow and rarity, and a pair of sapphire, tsavorite garnet, and diamond earclips by JAR, valued between CHF 300,000 and 500,000. These pieces reflect the creativity and craftsmanship that define high jewellery.

Collectors can also look forward to signature pieces from Cartier, Van Cleef & Arpels, Graff, and De Grisogono — each representing the pinnacle of design. Notably, a 10.04-carat D-colour diamond ring by Graff (VVS2 clarity) and a De Grisogono ruby and diamond bombé ring highlight the elegance and innovation of contemporary jewellery artistry.

Sotheby’s is also celebrating 100 years of Art Deco design, featuring geometric masterpieces from Cartier and Van Cleef & Arpels, and unveiling two notable private collections — one dedicated exclusively to Van Cleef & Arpels, and another titled Aria of Jewels: The Collection of Antje-Katrin Kühnemann, showcasing exquisite Cartier and De Grisogono creations.

Royal & Noble Jewels: Treasures of History

Beyond gemstones, the Royal & Noble Jewels auction unveils some of the most historic pieces ever seen at Sotheby’s Geneva. Among the highlights is a diamond brooch once owned by Emperor Napoleon Bonaparte, lost during his escape from Waterloo and later recovered by the Prussian Royal family. Now, after more than two centuries, this extraordinary jewel returns to the spotlight.

Other royal highlights include a light pink diamond ring once belonging to Empress Catherine I of Russia and later owned by Princess Neslishah Sultan, estimated between CHF 240,000 and 400,000. There’s also a natural pearl and diamond jewel originally owned by Cunegonde of Saxony, cousin of Louis XVI, and a diamond tiara once worn by Henrietta Scott, Duchess of Portland.

Adding to the allure, an 11.78-carat Colombian emerald and diamond necklace by Cartier, commissioned in 1932, showcases the perfect blend of Art Deco style and royal provenance — a collector’s dream.

Why Provenance and Rarity Matter

From Napoleon’s lost diamond brooch to The Glowing Rose pink diamond, Sotheby’s Geneva 2025 proves that natural diamonds and historic jewels continue to hold unmatched appeal and enduring value. These are not just ornaments — they are tangible connections to history, artistry, and legacy.

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