The New York-based jewelry brand has expanded overseas, opening a store in London’s Mayfair district.
5-Carat ‘Ai’ Blue Diamond to Sell for $12-15M
The rare stone is the highlight of Sotheby’s Oct. 3 jewelry auction in Hong Kong.

Hong Kong—A 5-carat fancy vivid blue diamond ring will be the highlight of Sotheby’s upcoming jewelry auction in Hong Kong.
Named the “Ai” diamond after the Chinese word for love, the stone is expected to sell for between $12.5 and $15.3 million when it hits the block next month.
It is the leading lot in Sotheby’s Hong Kong Magnificent Jewels and Jadeite jewelry sale, slated for Oct. 3 at the Hong Kong Convention and Exhibition Centre.
In addition to the Ai diamond, the jewelry auction will feature a pair of earrings with old European brilliant-cut fancy vivid yellow diamonds weighing 51.17 carats total—“well-matched” in color, ton and saturation, Sotheby’s said—accented with white diamonds. They are designed to depict a fruitful harvest of melons flowering from their vines.
The earrings, pictured below, could sell for between $4.8 and $6.1 million.
There also will be a number of important jade pieces, including a necklace composed of 51 jadeite beads of a brilliant emerald green color and with “very good” translucency, with a diamond clasp signed Chaumet. Pictured below, its pre-sale estimate is available upon request by Sotheby’s.
The jewelry auction also will include two fine jadeite bangles displaying hues of both lavender and green that blend seamlessly. Possessing strong saturation and fine translucency, the pair will be sold separately, with estimates of $665,000-$895,000 (left bangle) and $640,000-$895,000 (right bangle).
The jewelry auction also will have a section featuring works created by celebrated Asian contemporary designer Wallace Chan. This includes the tanzanite, chalcedony and diamond ring seen below, which could sell for as much as $230,000, as well as the earrings pictured below featuring conch pearl, gems and diamonds, which could sell for between $281,000 and $408,000.
The gallery also shows a pair of gem-set earrings from Chan, also featuring jade and diamonds, which are expected to garner between $70,500 and $109,000.
Chan was the first Asian jeweler to exhibit at the Biennale in Paris in 2012, and today can be seen at such major fairs as The European Fine Art Fair (TEFAF) and Masterpiece in London. His pieces are sought by collectors from around the world.
Rounding out the jewelry auction will be a selection of red carpet necklaces by jewelers such as Van Cleef & Arpels and David Morris, as well as a vintage Bulgari suite, and a curated selection of jewels primarily from the 1950s
The Latest

Rising revenue does not automatically mean a healthy business, particularly in the current economic landscape, Smith writes.

These long, fluid drop earrings are sure to catch the eye.

Colored gemstones, artisan finishes, mixed metals, and meaningful details are shaping demand in bridal jewelry.

Alberto Perez-Elias is one of four men charged with robbing a Cape Coral, Florida, jewelry store and is the only one still at large.


Initiatives in Art and Culture is hosting its 16th annual Gold and Diamond Conference, with the theme of “Resilience.”

The designer, who once said she’d never sell lab-grown diamonds, debuted two capsule collections designed to be fun and easy to wear.

DCA is preparing the next generation of professionals by supporting workforce development, leadership growth, and career advancement.

The diamond miner and marketer is undergoing another round of cost-cutting measures ahead of its sale by Anglo American.

The annual trade-only buying event is slated for Oct. 16-19 in Miami Beach, Florida.

AGTA also has announced the lineup of judges for the colored gemstone cutting and jewelry design contest’s various categories.

Collectibles platform Arena Club’s new Time Boxes could contain a Rolex or Patek Philippe watch.

The “Constellation Plié” collar, our Piece of the Week, features diamonds arranged in a constellation of shining stars.

Shaun Wills joined the company in 2024 and was chief financial officer of the De Beers Brands and Consumer Markets division.

In honor of its 20th anniversary, the jewelry brand has released a limited-edition collection of Swiss-made timepieces.

“Human Being” highlights the similarities and differences between us through five sets of jewelry that celebrate fine craftsmanship.

Richemont will continue to provide operational services for the watch brand for a period while the group prepares to integrate it.

Enoch Platero, founder and designer behind Enoch Michael, is the first Native American jeweler to win the award.

AGS also announced the recipient of its “Women in Leadership” scholarship.

The founder of the billion-dollar jewelry and lifestyle brand will debut as a full-time “Shark” on the upcoming season of the show.

Plus, why retailers should be ready to adjust as the U.S. population may decline this year for the first time since the Great Depression.

René Lalique’s “Woman Dragonfly With Open Wings” pendant, the first piece the museum acquired, was one of the jewels taken.

Arien Gessner and Moss Makhoulian have been elevated into newly created roles.

A podcast prompted Smith to share his views on where origin fits into the natural diamond story and the viability of branded diamonds.

The association selected eight recipients for the funding program, which is in its second year.

Whether celebrating America’s 250th birthday or the USA’s World Cup run, July birthstone jewelry can double as a patriotic accessory.

Around 20 pieces of jewelry were stolen from the museum dedicated to French jeweler and glassmaker René Lalique.

























