AuctionsMar 11, 2026
‘Spectacular’ 26-Carat Diamond Going Up for Auction in London AuctionsMar 16, 2026
Bonhams Paris To Offer Antique, Signed Jewels
The live fine jewelry auction will take place later this week, showcasing antique pieces, rare gemstones, and signed jewels.
A diamond necklace (left) and a nearly 26-carat sapphire ring (right) are highlights of Bonhams Cornette de Saint Cyr’s fine jewelry auction slated for March 19.
Paris—Bonhams Cornette de Saint Cyr will offer more than 180 lots including notable antique jewels and signed pieces at its fine jewelry sale in Paris on Thursday.
The sale will showcase antique pieces and rare gemstones, as well as signed jewels from Cartier, Boucheron, Bulgari, Chaumet, Graff, Tiffany & Co., Van Cleef & Arpels, and Buccellati.
Leading the sale is a diamond necklace, pictured at the top of the article, made with articulating links set with old brilliant-cut diamonds. It is estimated to achieve €60,000 to €70,000 ($68,000 to $80,000).
Another highlight is a ring set with a 25.56-carat, oval-cut Sri Lankan sapphire surrounded by brilliant-cut diamonds. It is estimated to sell for €25,000 to €35,000 ($28,500 to $40,000).
“The forthcoming fine jewellery Paris sale offers a remarkable selection of jewels, many sourced from private collections,” said Marine Girardet, Bonhams head of jewellery, France.
“The lots highlight exceptional craftsmanship across eras, from antique and Art Deco masterpieces to contemporary designs, featuring an abundance of colorful gemstones, including a significant collection of emeralds and playful, vibrant creations.”
Another standout lot is a Bulgari colored gemstones sprung bracelet, circa 1980, that Girardet calls “a modern piece poised to captivate collectors worldwide.”
The sale will showcase antique pieces and rare gemstones, as well as signed jewels from Cartier, Boucheron, Bulgari, Chaumet, Graff, Tiffany & Co., Van Cleef & Arpels, and Buccellati.
Leading the sale is a diamond necklace, pictured at the top of the article, made with articulating links set with old brilliant-cut diamonds. It is estimated to achieve €60,000 to €70,000 ($68,000 to $80,000).
Another highlight is a ring set with a 25.56-carat, oval-cut Sri Lankan sapphire surrounded by brilliant-cut diamonds. It is estimated to sell for €25,000 to €35,000 ($28,500 to $40,000).
“The forthcoming fine jewellery Paris sale offers a remarkable selection of jewels, many sourced from private collections,” said Marine Girardet, Bonhams head of jewellery, France.
“The lots highlight exceptional craftsmanship across eras, from antique and Art Deco masterpieces to contemporary designs, featuring an abundance of colorful gemstones, including a significant collection of emeralds and playful, vibrant creations.”
Another standout lot is a Bulgari colored gemstones sprung bracelet, circa 1980, that Girardet calls “a modern piece poised to captivate collectors worldwide.”
A Bulgari colored gemstones sprung bracelet designed in a yellow gold fluted motif, set with pink and green tourmalines, amethysts, blue topaz, and citrine cabochons
A Boucheron diamond clip brooch featuring a scrolling design, set throughout with old brilliant-, circular-, and baguette-cut diamonds
A Chaumet bracelet made with an articulating series of drop-shaped plaques, each set with an oval-cut sapphire
Other signed jewels on offer include a Boucheron diamond clip brooch, circa 1930, that is estimated to fetch €10,000 to €15,000 ($11,400 to $17,000).
A Chaumet sapphire bracelet is also up for sale. It is estimated to sell for €5,000 to €7,000 ($5,700 to $8,000).
Among the antique offerings is a garnet and diamond necklace, circa 1880, that originated from a Greek princess, which has a pre-sale estimate of €20,000 to €25,000 ($23,000 to $28,500), and a diamond cuff bracelet dating from the end of the 19th century, estimated to sell for €10,000 to €12,000 ($11,400 to $13,700).
This garnet necklace is designed as a series of articulated floral links, culminating at the center with three ribbon motifs, suspending foliate garlands, set throughout with rose-cut diamonds and highlighted by circular and oval-shaped garnet cabochons.
This cuff features an old cushion-shaped diamond and two rose-cut diamonds set in a yellow gold supple Milanese bracelet with Greek-key motifs.
At left, a brooch designed as an openwork rosette with rose-cut diamonds and black enamel, mounted in yellow gold. At right, an enamel, ruby, and diamond snake bangle.
Also on offer is an enamel, ruby, and diamond snake bangle dating from the mid-19th century (est. €5,000 to €7,000, or $5,700 to $8,000) and an enamel and diamond brooch (est. €1,500 to €2,500, or $1,700 to $2,800).
Emerald jewelry is also a highlight of the auction.
A 19th-century emerald necklace with provenance from a Greek princess
A ring centering on a 16.82-carat Colombian emerald surrounded by diamonds is estimated to fetch €18,000 to €22,000 ($20,500 to $25,000).
A Bulgari ring set with a 3.41-carat, step-cut Colombian emerald surrounded by brilliant- and baguette-cut diamonds is on offer as well, with an estimate of €15,000 to €20,000 ($17,000 to $23,000).
There is also an emerald and diamond necklace dating from the end of the 19th century. Originating from a Greek princess, it features an openwork mount with foliate scrolling motifs set with diamonds and highlighted by step-cut emeralds, which suspending emeralds and old brilliant-cut diamond drops.
It is estimated to achieve €15,000 to €20,000 ($17,000 to $23,000).
To see more of the jewelry on offer, visit the Bonhams website.
Editors' Picks
Sponsored by
More on Auctions
The Latest
SourcingJul 15, 2026
1,305-Carat Diamond Recovered from Mine in BotswanaThe yet-to-be named stone is the 10th diamond weighing more than 1,000 carats to come out of Lucara’s Karowe mine.
IndependentsJul 15, 2026
New Jersey Jeweler Barry Berman Dies at 81The founder of Fords Jewelers, Berman is remembered for his love of connecting with his community.
FinancialsJul 15, 2026
Watches of Switzerland’s US Sales Jump 18%, Declines to Comment on Sale Report The watch and jewelry retailer had a strong fiscal year despite what its CEO described as a “complex operating backdrop.”
Brought to you by
Wedding Band Trends 2026: Personalization Takes Center StageColored gemstones, artisan finishes, mixed metals, and meaningful details are shaping demand in bridal jewelry.
Events & AwardsJul 15, 2026
Hamptons Jewelry Show to Return in JulyThe open-to-the-public luxury jewelry and timepiece show, in its second year, is slated for July 23-26.
Weekly QuizJul 09, 2026
This Week’s QuizTest your jewelry news knowledge by answering these questions.
CollectionsJul 15, 2026
Pomellato’s New High Jewelry Is LiberatingBold color, expressive gem-setting, and sculptural form define the three chapters that make up “Stile Libero.”
IndependentsJul 14, 2026
Foundrae Opens First Standalone Store Outside USThe New York-based jewelry brand has expanded overseas, opening a store in London’s Mayfair district.
Brought to you by
Building the Future of Jewelry Retail: DCA Expands Education, Leadership Development, and Workforce SolutionsDCA is preparing the next generation of professionals by supporting workforce development, leadership growth, and career advancement.
ColumnistsJul 14, 2026
Sherry Smith: What Today’s Jewelry Consumer Is Telling Us Rising revenue does not automatically mean a healthy business, particularly in the current economic landscape, Smith writes.
TrendsJul 14, 2026
Amanda’s Style File: Shoulder Dusters These long, fluid drop earrings are sure to catch the eye.
CrimeJul 14, 2026
Man Charged in $1M Jewelry Store Heist Lands on FBI Most Wanted ListAlberto Perez-Elias is one of four men charged with robbing a Cape Coral, Florida, jewelry store and is the only one still at large.
Events & AwardsJul 14, 2026
Conference on Mining, Sustainability Kicks Off in NYCInitiatives in Art and Culture is hosting its 16th annual Gold and Diamond Conference, with the theme of “Resilience.”
Lab-GrownJul 13, 2026
Stephanie Gottlieb Changes Her Mind on Lab-Grown DiamondsThe designer, who once said she’d never sell lab-grown diamonds, debuted two capsule collections designed to be fun and easy to wear.
SourcingJul 13, 2026
De Beers Announces Potential Layoffs, 2-Year Production Pause at VenetiaThe diamond miner and marketer is undergoing another round of cost-cutting measures ahead of its sale by Anglo American.
Events & AwardsJul 13, 2026
Registration Opens for JIS Fall 2026 ShowThe annual trade-only buying event is slated for Oct. 16-19 in Miami Beach, Florida.
Events & AwardsJul 13, 2026
AGTA Accepting Entries for Spectrum 2026AGTA also has announced the lineup of judges for the colored gemstone cutting and jewelry design contest’s various categories.
TechnologyJul 10, 2026
There’s a New Blind Box for Luxury Watches Collectibles platform Arena Club’s new Time Boxes could contain a Rolex or Patek Philippe watch.
TrendsJul 10, 2026
Jade Trau Creates a Constellation of DiamondsThe “Constellation Plié” collar, our Piece of the Week, features diamonds arranged in a constellation of shining stars.
SourcingJul 10, 2026
CFO of De Beers’ Consumer-Facing Division Leaves Company Shaun Wills joined the company in 2024 and was chief financial officer of the De Beers Brands and Consumer Markets division.
WatchesJul 10, 2026
Brilliant Earth Expands Into WatchesIn honor of its 20th anniversary, the jewelry brand has released a limited-edition collection of Swiss-made timepieces.
CollectionsJul 09, 2026
Boucheron’s New High Jewelry Collection Is an Ode to the Human Touch“Human Being” highlights the similarities and differences between us through five sets of jewelry that celebrate fine craftsmanship.
WatchesJul 09, 2026
Damiani Group Finalizes Acquisition of Baume & MercierRichemont will continue to provide operational services for the watch brand for a period while the group prepares to integrate it.
Events & AwardsJul 09, 2026
Halstead Names 2026 Grant WinnerEnoch Platero, founder and designer behind Enoch Michael, is the first Native American jeweler to win the award.
Events & AwardsJul 09, 2026
AGS, GIA Name 2026 Beatrice Shipley Scholarship WinnerAGS also announced the recipient of its “Women in Leadership” scholarship.
MajorsJul 08, 2026
Kendra Scott Joins ‘Shark Tank’ As Permanent Investor The founder of the billion-dollar jewelry and lifestyle brand will debut as a full-time “Shark” on the upcoming season of the show.
SurveysJul 08, 2026
Signet Jewelers Falls 5 Spots on NRF’s ‘Top 100’ Retailers ListPlus, why retailers should be ready to adjust as the U.S. population may decline this year for the first time since the Great Depression.
CrimeJul 08, 2026
Here’s What Thieves Stole From the Lalique Museum René Lalique’s “Woman Dragonfly With Open Wings” pendant, the first piece the museum acquired, was one of the jewels taken.
