EditorsJun 16, 2025
Q&A: Bogolo Joy Kenewendo on Mining, Tariffs, and the Energy of Las VegasFollowing visits to Vegas and New York, Botswana’s minerals minster sat down with Michelle Graff to discuss the state of the diamond market.
IndependentsJun 25, 2019
J.J. Marco’s Mark Cohen Dies at 63
He co-founded the fine jewelry brand with wife Julianne Jaffe in 1990.
He co-founded the fine jewelry brand with wife Julianne Jaffe in 1990.
New York—Mark Cohen, designer and co-founder of fine jewelry brand J.J. Marco, died May 27. He was 63.
Cohen and wife Julianne Jaffe started J.J. Marco in 1990.
Prior to that, he had apprenticed as a bench jeweler for his father’s fine jewelry workshop and earned an art degree at the esteemed Pratt Institute in Brooklyn, New York.
Designing for his own brand landed Cohen’s jewelry in retailers like Neiman Marcus, Saks Fifth Avenue and the Metropolitan Museum of Art in New York, as well as various independent retailers across the United States.
In 2005, Cohen and Jaffe opened their own J.J. Marco boutique in New York City’s posh Upper East Side neighborhood, on Madison Avenue.
Described as an artist, Cohen created custom jewelry throughout his career for his clientele.
“He was a wonderful photographer and sculptor as well as a jewelry designer,” Jaffe said of her husband, “but the first thing everyone noticed about him was what an incredibly thoughtful, kind, generous person he was.”
Longtime jewelry journalist Lorraine DePasque commented: “Not only did he leave this world with a body of signature, beautiful jewelry designs but, and perhaps more importantly, he left after living a life of trying to make the world around him more beautiful.”
In his free time, Cohen loved to run, completing 13 marathons. He was also an avid fly and saltwater fisherman.
He is survived by Jaffe, who will continue to operate the New York City boutique, and his children, Stefanie and Jeremy.
More on Independents
The Latest
MajorsJun 16, 2025
Ivette Nersesyan-Stephanopoulos Joins Tiffany & Co.The former De Beers executive is the jewelry house’s new director of high jewelry for the Americas.
MajorsJun 16, 2025
Catbird Names WNBA Star Nyara Sabally as Its New Brand AmbassadorThe New York Liberty forward is the first athlete to represent the Brooklyn-based jewelry brand.
Brought to you by
Investing in the Next Generation of Bench JewelersThe Seymour & Evelyn Holtzman Bench Scholarship from Jewelers of America returns for a second year.
CollectionsJun 13, 2025
Piece of the Week: Robinson Pelham’s Pear EarringsTake a bite out of the 14-karat yellow gold “Fruits of Love Pear” earrings featuring peridots, diamond stems, and tsavorite leaves.
Weekly QuizJun 12, 2025
This Week’s QuizTest your jewelry news knowledge by answering these questions.
Events & AwardsJun 13, 2025
AGA to Host ‘Diamonds From Mine to Market’ Education ConferenceThe one-day virtual event will feature speakers from De Beers, GIA, and Gemworld International.
EditorsJun 12, 2025
15 Questions With Jewelry Photographer Ella SophieThe California-based creative talks jewelry photography in the modern era and tackles FAQs about working with a pro for the first time.
Brought to you by
Jewelers of America is Headed to Las Vegas for JCK 2025The countdown is on for the JCK Las Vegas Show and JA is pulling out all the stops.
AuctionsJun 12, 2025
Vintage Patek Philippe From the ‘50s Sells for $4M at Sotheby’s Al Capone’s pocket watch also found a buyer, though it went for less than half of what it did at auction four years ago.
Events & AwardsJun 12, 2025
Gabriel Love Foundation Introduces Scholarship Honoring Elias GabrielThe foundation has also expanded its “Stronger Together” initiative with Jewelers for Children.
AuctionsJun 12, 2025
Former De Beers Exec Celine Assimon Joins BonhamsAssimon is the auction house’s new chief commercial officer.
EditorsJun 11, 2025
Q&A: Al Cook on Differentiating Natural Diamonds, Traceability, and TariffsThe De Beers Group CEO discusses the company’s new “beacon” program, the likelihood diamonds will be exempt from tariffs, and “Origin.”
MajorsJun 11, 2025
Pandora Bets on Las Vegas for First North American FlagshipThe Danish jewelry giant hosted its grand opening last weekend, complete with a Pandora pink roulette wheel.
GradingJun 11, 2025
Tiffany Stevens Exits IGI, Lab Appoints New Board LeaderIndustry veteran Anoop Mehta is the new chairman and independent director of the IGI board.
Events & AwardsJun 11, 2025
Kering Announces Winners of Sustainability-Focused AwardThe winners of the inaugural “Kering Generation Award x Jewelry” are student Lee Min Seo and China-based startup Ianyan.
SourcingJun 10, 2025
De Beers Turns to Brown, Yellow Diamonds for New ‘Beacon’“Ombré Desert Diamonds” will emphasize cream-, champagne-, and brown-colored diamonds, shades that set natural stones apart from lab grown.
AuctionsJun 10, 2025
Noonans to Auction 16th-Century Signet RingIt's one of the “Gresham grasshopper” rings English financier Sir Thomas Gresham was known to gift to acquaintances or business associates.
CollectionsJun 10, 2025
Tabayer Names Mary Chiam as CEOThe brand also debuted its new “Zorae” collection featuring a talisman of protection and harmony inspired by a sheaf of wheat.
MajorsJun 10, 2025
Lauren Johansen Joins Loudr As Loudr’s new account manager, Johansen will partner with clients to craft and execute marketing strategies.
Events & AwardsJun 09, 2025
And the Winners of the 2025 Couture Design Awards Are … Designers were recognized in 12 categories, from platinum to pearls, before the evening ended with a new, retail-focused award.
AuctionsJun 09, 2025
Nancy Astor’s Cartier Tiara Sells for $1.2MThe rare turquoise and diamond jewel was the top lot at Bonhams’ June jewelry sale.
Events & AwardsJun 09, 2025
CASE Awards Now Accepting Entries For 2025The deadline to submit is June 16.
MajorsJun 09, 2025
RDI Diamonds Partners With LavalierThe diamond wholesaler is working with the insurance provider to seamlessly offer personal jewelry insurance to RDI retailers’ clients.
CollectionsJun 06, 2025
Piece of the Week: Harwell Godfrey’s ‘Granny Squares Eleanor’ Necklace As an homage to iconic crochet blankets, the necklace features the nostalgic motif through a kaleidoscope of cabochon-cut stones.
Events & AwardsJun 05, 2025
The 12 Fresh Faces in Couture’s Design AtelierDiscover the dozen up-and-coming brands exhibiting in the Design Atelier for the first time.
SourcingJun 05, 2025
A Rare Suite of Rubies Has Arrived in Las VegasThe “Royal Ruby” Collection is a quintet of untreated rubies curated by collector Jack Abraham.
Events & AwardsJun 05, 2025
Daymond John to Give Keynote at JCK Las VegasThe entrepreneur and “Shark Tank” star will share his top tips for success.
