Sotheby’s June auction spotlights rare blue diamond and Harry Winston jewels
A 10.02-carat Fancy Intense Blue diamond above $6 million leads Sotheby’s New York sale, beside a detachable Harry Winston jewel up to $1.2 million.
Sotheby’s put its sharpest fantasy pieces front and center with a 10.02-carat Fancy Intense Blue diamond estimated above $6 million and a circa-1960s Harry Winston necklace-bracelet combination valued at $800,000 to $1.2 million. Together, they turned a 119-lot High Jewelry sale in New York into a lesson in what serious collectors still prize most: rarity, signature, and wearability.
The auction was set for June 16 at 945 Madison Avenue, with public exhibition running June 11 to 15. Sotheby’s filled the room with rare colored stones, diamonds, and signed jewels from major houses, but the blue diamond was the star. Sotheby’s catalog described it as a cut-cornered rectangular modified brilliant Fancy Intense Blue diamond with VS2 clarity, accompanied by a Gemological Institute of America report dated May 28, 2026 and a letter identifying it as Type IIb, the classification linked to extremely rare blue diamonds.
That provenance matters as much as the sparkle. Sotheby’s said the stone was only the third fancy intense blue diamond of 10 carats or more to reach auction since 2008, which is exactly why 10-carat blue diamonds keep becoming headline jewelry rather than just expensive jewelry. Sotheby’s also sold the 10.03-carat Mediterranean Blue in Geneva for $21.5 million in May 2025, a reminder that this corner of the market has become a trophy lane for buyers who want something almost no one else can own.
The Harry Winston piece offers a different kind of gift fantasy, and maybe the more useful one for actual humans. Sotheby’s cataloged it as an exceptional diamond necklace-bracelet combination, signed Harry Winston, with maker’s marks for François Tavernier and a numbered setting. It was detachable into four sections and could be worn as two bracelets or as a necklace of varying length, which is the sort of old-school engineering that makes a jewel feel loved, not merely stored. For anyone shopping at a lower stratosphere, that flexibility is the cue to borrow: look for transformable designs, visible maker’s marks, and construction that lets one piece cover multiple occasions.
Sotheby’s broader June jewelry calendar also included a private collection of five Paraíba tourmalines, another signal that vivid color still drives demand. The practical takeaway is simple: the best heirloom gifts are not just rare, they are legible. Blue diamonds win on scarcity, signed vintage jewels win on pedigree, and the smartest purchases at smaller budgets borrow both ideas, choosing stones with memorable color and settings that can actually live in a wardrobe.
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