Sotheby’s Geneva sale tops $30 million as vintage jewels shine
Sotheby’s Geneva sale cleared 93 percent of lots, but an unsold 6.03-carat blue diamond showed where bidders drew the line.
Sotheby’s Geneva High Jewelry sale showed its sharpest lesson in one pair of results: a 6.03-carat fancy vivid blue diamond failed to sell, while white diamonds and vintage jewels found eager buyers. The May 12 auction at the Mandarin Oriental in Geneva brought in about CHF 23.361 million, or roughly $30.087 million, with 93 percent of lots sold and more than 60 percent finishing above their high estimates.
The top lot, a cushion-shaped, internally flawless Type IIb blue diamond from South Africa’s Cullinan mine, carried an estimate of CHF 7.2 million to CHF 9.6 million, about $9 million to $12.3 million, but drew no buyer. Sotheby’s later said the stone may still be sold soon. For collectors, that gap matters: even among exceptional diamonds, the market is still punishing pricing that runs ahead of conviction.
What did move was the kind of material vintage jewelry buyers recognize as both rare and legible. The highest-value lot sold was a pair of perfectly matched unmounted brilliant-cut 18.38-carat D-color diamonds from Botswana’s Jwaneng mine, part of a Sotheby’s and De Beers collaboration. One stone was flawless and the other internally flawless, and the pair sold for about CHF 2.5 million, or $3.27 million. A royal-provenance Colombian emerald and diamond necklace, set with 13 drop-shaped emeralds weighing 347.11 carats in total, brought about CHF 1.9 million, or $2.47 million.
That split says a great deal about today’s diamond appetite. White stones with exacting pedigree, impeccable grading and clean provenance still command strong bidding, especially when the market can understand the quality at a glance. The same sale also featured a 102.40-carat Ceylon sapphire called The Peacock of Ceylon, while rubies were another strong category, and signed jewels by Cartier, Van Cleef & Arpels, Bulgari, Bucherer and Chopard added further momentum. Sotheby’s said collectors came from more than 30 countries, with bidding led by the United States, Hong Kong, the Middle East and Europe, and Jessica Wyndham called the engagement the strongest in a Geneva jewelry sale in more than five years.
Read the unsold blue diamond as a warning before bidding on comparable marquee stones: rarity only goes so far when estimate discipline is lacking. In Geneva, the pieces that won were the ones whose quality, color and provenance made their value easy to defend.
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