Sotheby's New York sale spotlights 10.02-carat blue diamond and Paraíba tourmalines

Sotheby’s New York High Jewelry sale is acting as a live benchmark for the market’s most coveted vivid stones, with a 10.02-carat Fancy Intense Blue diamond leading the room and a Paraíba tourmaline adding a flash of neon-bright color. For shoppers tracking what is gaining status now, the message is blunt: saturated color, exacting cuts and hard-to-find gem material are commanding the sharpest attention.

Lot 120, the blue diamond, is a cut-cornered rectangular modified brilliant weighing 10.02 carats and graded VS2 clarity, natural color, by a GIA report dated May 19, 2026. A GIA letter identifies it as Type IIb, the diamond category associated with boron, which gives blue diamonds their color. Sotheby’s says blue diamonds are among the rarest gem materials on earth, and that only 0.3 percent of colored diamonds submitted to GIA are predominantly blue. The auction house also notes that pure Fancy Intense Blue, without gray modifiers, is especially scarce. The stone carries more than beauty; it carries pedigree, with Sotheby’s tracing the modern myth of blue diamonds back to Jean-Baptiste Tavernier’s 1668 sale of a 112-carat blue diamond to King Louis XIV, later recut into the French Blue and ultimately the Hope Diamond.

The sale also includes a superb unmounted 6.11-carat Paraíba tourmaline of classic Brazilian origin, with no indications of clarity enhancement and reports from AGL and Gübelin. Paraíba remains one of the most forceful color stories in high jewelry because its electric blue-green hue reads instantly, even without scale. For buyers who cannot chase a seven-figure blue diamond, that intensity is the look to borrow: choose stones with unmistakable saturation, crisp cutting and minimal visual noise, whether the gem is set as a ring center stone or a pendant that lets the color do the talking.

Sotheby’s High Jewelry offering also includes an Exceptional Diamond Necklace-Bracelet Combination by Harry Winston, circa the 1960s, estimated at $800,000 to $1.2 million. Measuring approximately 15½ inches, it detaches into four sections and can be worn as two bracelets or as a necklace of varying length, with graduated pairs of round diamonds alternating with marquise-shaped diamond clusters. That kind of transformable design explains why old-house jewelry still feels so current: the craftsmanship is formal, but the wearability is alive.

Together, the blue diamond, the Paraíba tourmaline and the Harry Winston jewel show where the market is placing its highest praise. Rare color is not just decorative now, it is the status signal, and the most desirable stones are the ones that make a strong visual argument in a single glance.