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.
More on Auctions
The Latest
EditorsMar 16, 2026
2026 Oscars Jewelry: One Necklace After AnotherNatalie Francisco rounds up the top Oscars jewels, including Rose Byrne’s Taffin necklace with a more than 20-carat yellow-brown diamond.
WatchesMar 16, 2026
TAG Heuer Has a New CEOBéatrice Goasglas has been with TAG Heuer since 2018. She is the first woman to head the 166-year-old, LVMH-owned watch brand.
IndependentsMar 16, 2026
Ben Bridge Debuts New Honolulu BoutiqueThe store features the first in-store build for the jeweler’s in-house “Bella Ponte” bridal brand.
Brought to you by
Is This You? Every Jeweler Has This Problem; We Have the Solution.Every jeweler faces the same challenge: helping customers protect what they love. Here’s the solution designed for today’s jewelry business.
CollectionsMar 13, 2026
A Trio of Jewels from the 3 Gem Award Nominees for Jewelry DesignOur Pieces of the Week honor the 2026 nominees for the Gem Award for Jewelry Design, Silvia Furmanovich, Cece Fein-Hughes, and Catherine Sarr.
Weekly QuizMar 12, 2026
This Week’s QuizTest your jewelry news knowledge by answering these questions.
WatchesMar 13, 2026
Citizen, Vera Wang to Launch Watch CollectionThe 24-piece watch collection is set to debut in spring 2027.
SourcingMar 13, 2026
Andrea Pooler Joins Third-Generation Diamond Company as COO Pooler, who has more than 25 years’ experience in jewelry, is now chief operating officer of Modani Jewels, Soham Diamonds, and SNJ Creations.
Brought to you by
DCA Enters a New Chapter in Jewelry EducationWith refreshed branding, a new website, updated courses, and a pathway for growth, DCA is dedicated to supporting retail staff development.
MajorsMar 13, 2026
24 Karat Club of New York’s Banquet to Return to Waldorf AstoriaThe reopening of the Waldorf Astoria means a homecoming for the industry group’s annual event, which will take place Saturday.
CollectionsMar 12, 2026
Jessica McCormack Sends Gold, Gemstones Into ‘Orbit’McCormack looked to the 19th century’s “golden age” of astronomy when designing her new celestial-themed collection.
Events & AwardsMar 12, 2026
Johnny Nelson Wins David Yurman Gem Awards GrantNelson will be honored as the inaugural grant winner at the Gem Awards gala on Friday.
TechnologyMar 12, 2026
Caratwise Launches, Names Former Signet Exec CEO The new smart design software allows jewelers to configure, price, and confirm a custom engagement ring in real time for in-store customers.
SourcingMar 12, 2026
Grandview Klein Opens New Factory in South Africa The 10,000-square-foot diamond manufacturing facility officially opened in late February and employs 50 people.
Events & AwardsMar 12, 2026
MJSA ‘Future of Jewelry Making’ Scholarship Applications OpenThe MJSA Education Foundation’s scholarships support students pursuing jewelry careers.
TechnologyMar 11, 2026
Cast Jewelry’s Rachel Skelly on Coming Back Online Only Skelly shares her plans for reimagining the fine jewelry retailer she re-acquired after it faltered last year.
CollectionsMar 11, 2026
Pyrrha Highlights ‘The Space Between’ In New CollectionThe collection takes inspiration from the emotional space between people, moments, and experiences.
IndependentsMar 11, 2026
From the Jazz Age to the Information Age: London Jewelers Turns 100In 2026, the jewelry retailer is celebrating a milestone only a small percentage of family-owned businesses survive to see.
IndependentsMar 11, 2026
Virginia Jewelers Raise Nearly $30K for Children’s HospitalThe group of jewelers held a jewelry raffle in support of the Children’s Hospital of Richmond at VCU.
FinancialsMar 10, 2026
Signet Jewelers’ Q4 Sales Fall Flat The jewelry giant released preliminary results for the fourth quarter and full year on Monday, with final results slated to come next week.
MajorsMar 10, 2026
Saks Global to Close 15 More StoresThe retailer also gave an update on its vendor partnerships.
TrendsMar 10, 2026
Messika Names Julianne Moore as AmbassadorThe award-winning actress is the “epitome of modern allure,” the brand said.
CollectionsMar 10, 2026
Gemstones ‘Bloom’ in Sorellina’s New CollectionThe “Bloom” collection draws from the flower power movement of the 1960s and ‘70s with inlay pendants offered in eight colorways.
Events & AwardsMar 10, 2026
Diamond-Studded Painting Shines at RJO Foundation AuctionThe unique piece was one of the custom works offered at the foundation's recent silent art auction, which garnered nearly $15,000 in total.
TrendsMar 09, 2026
Jake Gyllenhaal Is Bulgari’s Latest AmbassadorBulgari named Gyllenhaal as its brand ambassador for his embodiment of artistic depth, intellectual curiosity, and warmth.
Events & AwardsMar 09, 2026
TJS Announces 2026 Scholarship WinnersAwards were given to four students, one apprentice, and an emerging jeweler.
GradingMar 06, 2026
Tom Moses Leaving GIA After Nearly 50 YearsMoses, who started at GIA’s Santa Monica lab in 1976, will leave the Gemological Institute of America in May.
Lab-GrownMar 06, 2026
Charles & Colvard Files for Bankruptcy, Citing Price PressuresIncreased competition, falling lab-grown diamond and moissanite prices, and the rising cost of gold took a toll on the moissanite maker.
