The Facts
On October 21, 2026, Aguttes announced its Jewelry auction will feature rare type IIa diamonds, which account for less than 2% of natural diamonds and are among the most sought-after stones for their exceptional transparency. The auction highlights diamonds from the Golconda region, historically associated with famous stones like the Koh-i-Noor and the Regent. A new book by Capucine Juncker, 'Diamants de Golconde', published by Skira in 2024 and reprinted in 2026, traces the history of these diamonds. Additionally, the Château de Chantilly presents the exhibition 'The Pink Diamond' from October 17, 2026, to January 3, 2027, focusing on the 9.01-carat Grand Condé pink diamond, also a type IIa stone.
The Signal
The focus on type IIa diamonds reflects a broader market trend toward gemmological transparency and historical provenance. Collectors increasingly seek stones with verifiable origins, and diamonds from the Golconda region carry a cachet that can significantly enhance value. The auction, combined with the scholarly and exhibition programming, positions these gems within a narrative that spans centuries, appealing to both investors and connoisseurs.
- People: Capucine Juncker, Jean-Baptiste Tavernier
- Auction Houses: Aguttes
- Museums: Château de Chantilly, Musée Condé
- Locations: Chantilly
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