The collection marks the first time GemFair’s artisanal diamonds will be brought directly to consumers.
Wife of Former Cartier Owner’s Jewelry Heads to Auction
The Danziger family, which owned the brand for four years, tapped Bonhams New York to sell the personal collection of Gigi Guggenheim Danziger next month.

New York--The wife of one of the former owners of Cartier Paris is auctioning off some of her jewelry, and she has tapped Bonhams New York to do it.
On Sept. 19, fine jewelry from the personal collection of Gigi Guggenheim Danziger will go under the hammer as part of the auction house’s Fine Jewelry sale, marking the first time the jewelry has appeared at auction.
The collection features 32 pieces of fine jewelry, including a number of signed Cartier pieces from the 1960s and 1970s, when the Danziger family owned Cartier Paris. The earliest lot dates back to 1957.
She attended Ohio State University from 1941 to 1944, majoring in education, and then moved to Atlanta and finally New York.
She met native New Yorker Edward J. Danziger at a society wedding in 1951. The two married later that year in Mexico and then went on to have two sons, Danny and James.
Edward and his brother, Harry Lee Danziger, were prolific film producers, creating more than 140 feature films in the 1950s and 1960s, as well as hundreds of hours of television. Then in 1958, the Danzigers acquired London’s Mayfair hotel, Grosvenor hotel and the Metropole hotel in Monte Carlo.
Ten years later, in 1968, the two brothers negotiated a secret deal to acquire Cartier Paris. As part of it, they also acquired Cartier shops in Monte Carlo, Cannes and Switzerland.
The Danziger family intentionally kept their ownership under wraps to maintain the Cartier name since the business, up until then, had been family-run.
During their four-year ownership of the brand, they expended the company’s footprint by opening Cartier stores in Hong Kong, Geneva and Munich. The family also traveled extensively around the world as its owners, but returned to America in 1977.
Edward died in March 1999 at the age of 89. Gigi now splits her time between Los Angeles and Palm Beach.
There will be 180 lots available overall at the Bonhams New York sale next month.
Aside from the Danziger collection, one of its highlights is a 16.90-carat step-cut diamond ring set with round brilliant-cut diamond shoulders. It’s expected to sell for between $1.6 million and $2.2 million.
The auction
Meanwhile, a rare Australian black opal and diamond pendant/brooch also will hit the block. The 48.80-carat gem is set within old European-cut diamonds and is estimated to sell for between $200,000 to $300,000.
Another interesting lot is a diamond, emerald and ruby brooch, circa 1900, purchased at a garage sale in Ohio a number of years ago for $8--the second such lot to hit auction this year.
The owner’s daughter was at a jewelry store when she pulled it out and shared the story about how it came into their possession. To her surprise, she was told it was real.
Bonhams had it tested by the Gemological Institute of America, which confirmed the stones were gem quality.
The brooch features an old mine-cut diamond, D color, VS1 clarity, weighing 1.39 carats; a rectangular-shaped emerald originating from Colombia, weighing approximately 1.50 carats; and an oval-shaped Burmese ruby, weighing approximately 0.60 carat.
It has a pre-sale estimate of $20,000 to $30,000.
There also will be signed pieces from Harry Winston, Cartier, René Lalique and David Webb.
All lots in the Sept. 19 Fine Jewelry sale can be seen on Bonhams.com.
The Latest


The initial charts are for blue, teal, and green material, each grouped into three charts categorized as good, fine, and extra fine.

The new tool can assign the appropriate associate based on the client or appointment type and automate personalized text message follow-ups.

Launched in 2023, the program will help the passing of knowledge between generations and alleviate the shortage of bench jewelers.

Buyers are expected to gravitate toward gemstones that have a little something special, just like last year.


Endiama and Sodiam will contribute money to the marketing of natural diamonds as new members of the Natural Diamond Council.

The retailer operates more than 450 boutiques across 45 states, according to its website.

Criminals are using cell jammers to disable alarms, but new technology like JamAlert™ can stop them.

The new members’ skills span communications, business development, advocacy, and industry leadership.

The jeweler’s 2026 Valentine’s Day campaign, “Celebrating Love Stories Since 1837,” includes a short firm starring actress Adria Arjona.

The new features include interactive flashcards and scenario-based roleplay with AI tools.

Family-owned jewelry and watch retailer Deutsch & Deutsch has stores in El Paso, Laredo, McAllen, and Victoria.

The Italian luxury company purchased the nearly 200-year-old Swiss watch brand from Richemont.

Micro-set with hundreds of diamonds, these snowflake earrings recreate “winter’s most elegant silhouette,” and are our Piece of the Week.

Ella Blum was appointed to the newly created role.

Sponsored by RapNet

Investment firm Enhanced Retail Funding, a division of Gordon Brothers, was the successful bidder.

It explores the history of the iconic tagline and the company’s strategy to redefine the role of diamonds in society.

Retail veteran Sindhu Culas has stepped into the role.

Taylor Burgess, who has been at Stuller since 2013, was promoted to the newly created role.

Was 2025 a good year for jewelers? Did lab-grown diamonds outsell natural? Find out on the first episode of the “My Next Question” podcast.

Whether you recognize their jewels or are just discovering them now, these designers’ talent and vision make them ones to watch this year.

Plus, JSA’s Scott Guginsky discusses the need for jewelers to take more precautions as the gold price continues to climb.

Morris’ most cherished role was being a mother and grandmother, her family said.

“Vimini” is the first chapter of the “Bulgari Eternal” collection that merges archival pieces with modern creations.

The third edition will be held in Half Moon Bay, California, in April.

The grant is in its first year and was created to recognize an exceptional fine jewelry designer whose star is on the rise.




















