Smith offers retailers guidance on creating an environment where natural and lab-grown diamonds can both thrive.
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

Former Emerald President and CEO Hervé Sedky has transitioned to the role of senior advisor.

The 12-piece capsule collection transforms from brooches to pendants.

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

A Botswana government official told lawmakers Anglo has selected The Global Diamond Consortium, an entity chaired by Penny, to buy De Beers.


The new tariff, imposed after a Trump administration study, is 25 percent and will stack on top of existing tariffs.

The collection from 2014 has been reinterpreted into high jewelry with its signature triangular-shaped elements.

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

She will also take on the role of vice president of jewelry for SmartWork Media, a newly created position.

Organizers are looking for presentations on topics like manufacturing, technology and research, bench work, gemstones, and sustainability.

Woodley is seen in the campaign wearing our Piece of the Week, the “Frida” collar featuring 13 pieces of hand-carved Venetian glass.

A WeBuyVintage jewelry expert uncovered how much the flea market find was actually worth.

The founder of natural colored diamond wholesaler Pancis Gems shares stories from his five decades in the industry.

Submissions for the milestone 25th annual Gem Awards will be accepted across three categories from now through July 31.

Valeriya Guzema and Mariana Lenha look back on the last decade and discuss the Ukrainian brand’s first U.S. store.

The diamond mine, which opened nearly 30 years ago in Canada’s Northwest Territories, is expected to shut down by mid-August.

Jewelry sales for the company, which owns Cartier, Van Cleef & Arpels, Vhernier, and Buccellati, rose 21 percent in the first quarter.

The graduate, Grace Barden, credited the program with helping her secure a job as a bench jeweler.

The event, scheduled for next month in New Orleans, will include dinner, a custom jewelry design contest, and education sessions.

The yet-to-be named stone is the 10th diamond weighing more than 1,000 carats to come out of Lucara’s Karowe mine.

The founder of Fords Jewelers, Berman is remembered for his love of connecting with his community.

The watch and jewelry retailer had a strong fiscal year despite what its CEO described as a “complex operating backdrop.”

The open-to-the-public luxury jewelry and timepiece show, in its second year, is slated for July 23-26.

Bold color, expressive gem-setting, and sculptural form define the three chapters that make up “Stile Libero.”

The New York-based jewelry brand has expanded overseas, opening a store in London’s Mayfair district.

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.
























