Its sessions will focus on inventory strategies, staff performance, retention and acquisition, emerging market trends, and more.
16.9-Carat Diamond Ring Fetches $1.8M at Bonhams
Unheated Kashmir sapphires were also a sale highlight, commanding hundreds of thousands of dollars.

New York--A 16.9-carat diamond ring garnered $1.8 million at Bonham’s New York Fine Jewelery Sale Tuesday, falling at the lower end of its pre-sale estimate of $1.6 to $2.2 million.
A private U.S. buyer bought the step-cut, type IIA, D color, internally flawless diamond.
Susan Abeles, head of jewelry for Bonhams U.S., said of the stone: “This is one of the finest examples of a diamond there is, given its rarity, color, cut, clarity and transparency. It was admired widely during our previews in New York, L.A., Geneva and Hong Kong and the diamond was extraordinarily charming.”
Fine jewelry from the personal collection of Gigi Guggenheim Danziger, whose husband owned Cartier for four years, also was part of the auction, including many signed Cartier pieces.
Highlights from the 32 Danziger lots included a Cartier diamond necklace with three rectangular-shaped diamonds serving as its focal point, with round brilliant-cut diamonds set throughout, which fetched $37,500.
A Cartier ruby and diamond brooch, with the center diamond weighing 4.24 carats, garnered $46,000. Danziger wore it to the London premier of “The Godfather.” It was an anniversary present from her husband.
Danziger’s Cartier sapphire and diamond brooch went for $37,500. It featured a cushion-shaped modified step-cut sapphire, weighing approximately 7.10 carats, surrounded by marquise and pear-shaped diamonds.
Several Kashmir sapphires fetched high prices at Bonhams Fine Jewelry sale, including a 5.33-carat cabochon sapphire ring by Stephen Russell that also featured old European cut diamonds. The sapphire had no indications of heat or clarity enhancement. An online buyer paid $235,000 for the piece.
A cushion-shaped, mixed-cut sapphire weighing 5.30 carats and framed by a halo of old European cut diamonds, sold for $230,000. The no-heat sapphire was only expected to fetch between $100,000 and $150,000.
Similarly, an emerald ring made a splash at the auction, garnering $235,000. It featured an oval-shaped, modified brilliant cut 7-carat Colombian emerald flanked by similarly cut fancy vivid yellow diamonds weighing 1.09 carats and 1.04 carats.
Signed jewelry was also a hit with buyers, with a sapphire and diamond clip brooch by Oscar Heyman fetching $87,500 and an enamel and glass Medusa pendant by Rene Lalique selling for $69,500.
And, in what was possibly the most interesting lot of the bunch, a circa 1900 diamond, emerald and ruby brooch purchased at a garage sale for $8 in Ohio five years ago sold for $26,000 after a round of
Abeles concluded: “We had a really interesting sale this September, which featured the best diamonds you could buy, several Kashmir sapphires and some wonderful and extremely rare pieces of jewelry from the Art Nouveau and Art Deco periods. These all performed very strongly at the auction along with signed jewelry from names such as Cartier, Oscar Heyman and Raymond Templier. It was notable to see that collectors form all over the world participated in the auction.”
The full results of the sale are available to view on Bonhams website.
The Latest

For its 10th anniversary, Miseno designed the “Arco” earrings based on the Arco Felice, an arch conceptualized in A.D. 95 in Miseno, Italy.

The jewelry company is one of several contributing to relief efforts in the region after the recent floods.

The Seymour & Evelyn Holtzman Bench Scholarship from Jewelers of America returns for a second year.

Inspired by fiancé Sid Wilson’s nickname for her, the white and yellow diamond ring features a unique honeycomb design.


The brand is marking its 50th anniversary with a limited-edition bangle, high jewelry suites, new collections, and more.

Goldfarb said changes in the industry, coupled with his age and the updates needed to modernize his business, drove his decision.

The countdown is on for the JCK Las Vegas Show and JA is pulling out all the stops.

Longtime LVMH executive Michael Burke has stepped into the role.

Central topics of next week’s event include climate action, labor rights, artisan preservation, and value retention in producing countries.

Vickie Rokkos has joined the jewelry company as its new national sales director of North America.

Turbulence will be the new baseline for luxury as it faces its biggest potential setbacks in 15 years, a recent report said.

Sponsored by Rio Grande Jewelry Supply

The “For the Love of Fruits” collection features five fruit pendants, each holding a different meaning.

Diamonds and crimes (some involving diamonds) top the list of National Jeweler’s most popular stories halfway through the year.

They discovered “The Dash Diamond,” named for their dog, at the Crater of Diamonds State Park earlier this month.

The “Les Pétales” collection imagines roses caught mid-bloom as a tribute to nature’s beauty.

Luxury brands charge thousands for their shoes and handbags. Jewelers pricing diamond products should take note, Peter Smith writes.

Rotenberg was an active member of the American Gem Society and an accomplished appraiser who also worked with therapy dogs at a hospital.

It follows New York-based brand Shahla Karimi Jewelry’s all-women team in “Say Yes to the Dress” meets “The Office”-style episodes.

In its inaugural year, the SMO Foundation will focus on supporting two organizations in West Africa and one in South America.

The announcement comes just as the 90-day freeze on the “reciprocal” tariffs nears its end, giving countries more time to negotiate.

Kellie, who joined the organization in 2019, will remain in his role through the end of 2025.

Police officers apprehended the suspects as they were allegedly attempting to gain entry into another jewelry store.

The program, a collaboration between Julius Klein Diamonds and the Women’s Jewelry Association, is in its second year.

Sponsored by the Gemological Institute of America

The 2025 Australian Open champion is the jewelry brand’s first athlete ambassador.