GradingJun 11, 2025
Tiffany Stevens Exits IGI, Lab Appoints New Board LeaderAuctionsJun 12, 2025
Former De Beers Exec Celine Assimon Joins Bonhams
Assimon is the auction house’s new chief commercial officer.
Celine Assimon has been named Bonhams’ new chief commercial officer.
London– Bonhams has appointed Celine Assimon as its chief commercial officer.
Assimon brings more than two decades of experience leading commercial strategy, client engagement, and brand development across global markets.
Prior to joining Bonhams, Assimon was CEO of De Beers London, where she led a major brand transformation, expanded its international retail presence, and implemented customer-centric strategies, the auction house said.
Previously, she has served as CEO of De Beers Forevermark, CEO of De Grisogono, and held senior leadership roles at Richemont and Louis Vuitton, including international director of high jewelry and exceptional pieces at Piaget.
Assimon is also a certified diamond graduate from the Gemological Institute of America.
In her new role, Assimon will be based in London and oversee global commercial strategy and drive client experience across all areas of the business.
Bonhams said she will be instrumental in aligning the company’s commercial vision with its expanding global platform, ensuring consistent growth and innovation across the auction house’s diverse portfolio of categories.
"We are delighted to welcome Celine Assimon to Bonhams. She brings a powerful blend of commercial expertise, leadership, and a deep understanding of the luxury market,” said Bonhams Global CEO Chabi Nouri.
“Her appointment reinforces our commitment to strengthening client relationships and enhancing Bonhams’ global commercial capabilities."
Assimon said she is thrilled to join the auction house at such a dynamic point in its evolution.
"With its exceptional heritage and forward-looking vision, Bonhams is uniquely positioned in the auction world. I look forward to contributing to its continued global growth and success," she said.
Related stories will be right here …
Assimon brings more than two decades of experience leading commercial strategy, client engagement, and brand development across global markets.
Prior to joining Bonhams, Assimon was CEO of De Beers London, where she led a major brand transformation, expanded its international retail presence, and implemented customer-centric strategies, the auction house said.
Previously, she has served as CEO of De Beers Forevermark, CEO of De Grisogono, and held senior leadership roles at Richemont and Louis Vuitton, including international director of high jewelry and exceptional pieces at Piaget.
Assimon is also a certified diamond graduate from the Gemological Institute of America.
In her new role, Assimon will be based in London and oversee global commercial strategy and drive client experience across all areas of the business.
Bonhams said she will be instrumental in aligning the company’s commercial vision with its expanding global platform, ensuring consistent growth and innovation across the auction house’s diverse portfolio of categories.
"We are delighted to welcome Celine Assimon to Bonhams. She brings a powerful blend of commercial expertise, leadership, and a deep understanding of the luxury market,” said Bonhams Global CEO Chabi Nouri.
“Her appointment reinforces our commitment to strengthening client relationships and enhancing Bonhams’ global commercial capabilities."
Assimon said she is thrilled to join the auction house at such a dynamic point in its evolution.
"With its exceptional heritage and forward-looking vision, Bonhams is uniquely positioned in the auction world. I look forward to contributing to its continued global growth and success," she said.
Editors' Picks
Sponsored by
More on Auctions
The Latest
ColumnistsJul 21, 2026
Sherry Smith: Shattering the Illusion of the ‘Either/Or’ Diamond MarketSmith offers retailers guidance on creating an environment where natural and lab-grown diamonds can both thrive.
Events & AwardsJul 21, 2026
Apollo Funds Completes Emerald AcquisitionFormer Emerald President and CEO Hervé Sedky has transitioned to the role of senior advisor.
CollectionsJul 21, 2026
Graff’s New Butterfly High Jewelry Brooches MetamorphosizeThe 12-piece capsule collection transforms from brooches to pendants.
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.
SourcingJul 21, 2026
Anglo Reportedly Selects Gareth Penny’s Consortium as Top Bidder for De BeersA Botswana government official told lawmakers Anglo has selected The Global Diamond Consortium, an entity chaired by Penny, to buy De Beers.
Weekly QuizJul 17, 2026
This Week’s QuizTest your jewelry news knowledge by answering these questions.
Policies & IssuesJul 20, 2026
Tariffs on Brazil to Increase But Rough Gemstones ExemptThe new tariff, imposed after a Trump administration study, is 25 percent and will stack on top of existing tariffs.
CollectionsJul 20, 2026
Vhernier Transforms ‘Freccia’ Collection Into High JewelryThe collection from 2014 has been reinterpreted into high jewelry with its signature triangular-shaped elements.
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.
MajorsJul 20, 2026
Krista Collins Walters Promoted to Publisher of InstoreShe will also take on the role of vice president of jewelry for SmartWork Media, a newly created position.
Events & AwardsJul 20, 2026
TJS Accepting Speaker Proposals for 2027 EventOrganizers are looking for presentations on topics like manufacturing, technology and research, bench work, gemstones, and sustainability.
CollectionsJul 17, 2026
HOWL Taps Shailene Woodley for ‘Home Sweet Home’ CampaignWoodley is seen in the campaign wearing our Piece of the Week, the “Frida” collar featuring 13 pieces of hand-carved Venetian glass.
SourcingJul 17, 2026
U.K. Woman Pays £5 for £15K Diamond Ring at Car Boot SaleA WeBuyVintage jewelry expert uncovered how much the flea market find was actually worth.
SourcingJul 17, 2026
Diamond Dealer Jeff Pancis Pens MemoirThe founder of natural colored diamond wholesaler Pancis Gems shares stories from his five decades in the industry.
Events & AwardsJul 17, 2026
Gem Awards Opens 2027 Nomination PeriodSubmissions for the milestone 25th annual Gem Awards will be accepted across three categories from now through July 31.
EditorsJul 16, 2026
Q&A: Guzema’s Co-Owners On Its US Expansion, 10-Year AnniversaryValeriya Guzema and Mariana Lenha look back on the last decade and discuss the Ukrainian brand’s first U.S. store.
SourcingJul 16, 2026
Ekati to Close, Leaving Canada With One Diamond Mine The diamond mine, which opened nearly 30 years ago in Canada’s Northwest Territories, is expected to shut down by mid-August.
FinancialsJul 16, 2026
Richemont’s Jewelry Sales Soar for the Seventh Quarter in a RowJewelry sales for the company, which owns Cartier, Van Cleef & Arpels, Vhernier, and Buccellati, rose 21 percent in the first quarter.
Events & AwardsJul 16, 2026
MJSA Mentor & Apprenticeship Program Certifies First Advanced Apprentice GraduateThe graduate, Grace Barden, credited the program with helping her secure a job as a bench jeweler.
Events & AwardsJul 16, 2026
Jewelers of Louisiana to Host 80th ConventionThe event, scheduled for next month in New Orleans, will include dinner, a custom jewelry design contest, and education sessions.
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.”
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.
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.
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.
