SourcingMay 13, 2026
Smithsonian Acquires ‘Winston Red’ Diamond PaintingReena Ahluwalia’s painting of the rare red diamond is the first contemporary painting to join the National Gem Collection.
CrimeMar 03, 2016
Police Investigating $5-10M Diamond District Theft
The New York Police Department is looking into the theft of as much as $10 million in diamonds from the safe of a company headquartered in the city’s jewelry hub.
New York--The New York Police Department is looking into the theft of as much as $10 million in diamonds from the safe of a company headquartered in the city’s Diamond District.
News about the missing stones first surfaced late last week. Reuters and a number of other news outlets reported the name of the diamond dealer as Jonathan Birnbaum of J. Birnbaum Inc., but National Jeweler confirmed via a number of sources on Monday that it is Jonathan Birnbach, owner of J. Birnbach Inc., who reported that diamonds had been stolen from his New York City office.
While the NYPD would confirm little beyond the fact that an investigation is ongoing into a formal complaint of grand larceny, the New York Daily News reported that Birnbach first made police aware of the theft last Wednesday.
According to the News, he told police he had placed three wooden boxes of diamonds in the safe on Nov. 24, but hadn’t noticed they were missing until this month because he wasn’t working with those particular gems.
Birnbach also reportedly said the safe was left unlocked during business hours so he and his employees could get in and out of it easily throughout the work day, which isn’t unusual for a company in the Diamond District. However, one diamond dealer told National Jeweler that if there were people in the office who are not employees or regular visitors (e.g., construction workers), then protocol would dictate that the safe be locked.
Sources told the News that police are interviewing contractors who reportedly were doing construction work in the building during the time the gemstones disappeared, and also are reviewing footage from J. Birnbach’s video surveillance system.
A woman who answered the phone Monday at J. Birnbach’s office said the company had no comment on the case.
Jonathan Birnbach, who spent years working for his father Max’s company, Fullcut Manufacturers, opened J. Birnbach in 1996. A year later, he was joined by Udi Moritz. The company specializes in cutting high-quality diamonds and has a collection of one-off pieces of platinum and diamond jewelry.
Editors' Picks
Sponsored by
More on Crime
The Latest
TrendsMay 13, 2026
State of Design: Only the Innovative Will SurviveThe price of gold has risen, affecting the number of pieces designers make, the materials they use, and how they position themselves.
ColumnistsMay 12, 2026
It’s Official: We’re Getting ‘Brain Rot’ From Watching Short-Form Videos Peter Smith gives tips on leading meetings, developing marketing, and making trade show appointments in the age of short attention spans.
Brought to you by
How Modern Training Is Becoming a Competitive Advantage for Jewelry RetailersWith the trade and customer trust in mind, GIA® developed NextGem™ – on-demand training designed specifically for retail.
CollectionsMay 12, 2026
Jessica McCormack Debuts Antique Coin-Inspired Medallions for SummerThe 11-piece “Medallions” capsule collection features five motifs: a crying eye, a heart on fire, a spiral, a flower, and a swallow.
Weekly QuizMay 07, 2026
This Week’s QuizTest your jewelry news knowledge by answering these questions.
IndependentsMay 12, 2026
State of Retail: 6 Things Retailers Should Know About Consumers TodayFrom Gen Z’s view of luxury to “doom spending,” these are the six consumer trends to note this year.
Events & AwardsMay 12, 2026
The Tiffany & Co. x CFDA Jewelry Designer Award Is BackThe partners have announced the second cycle of the program, which has expanded to include a $25,000 student scholarship.
Brought to you by
Discover Timeless Treasures: A Showcase of Antique Jewelry & Timepieces in Las VegasGain access to the most exclusive and coveted antique pieces from trusted dealers during Las Vegas Jewelry Week.
IndependentsMay 11, 2026
Kansas Jeweler Closing After 70 YearsThe owners of Staats Jewelers are heading into retirement.
TrendsMay 11, 2026
Former Macy’s CEO Joins Signet Jewelers BoardJeffrey Gennette, who retired in 2024 after 41 years with Macy’s, is the newest member of the jewelry retailer’s board of directors.
TrendsMay 11, 2026
Amanda’s Style File: Lucky May May babies are lucky to have emeralds, a gemstone admired for centuries, as their birthstone, writes Amanda Gizzi.
TechnologyMay 11, 2026
Clientbook’s New Tool Helps Jewelers Plan In-Store EventsThe new module allows retailers to plan, promote, and measure the success of events from a single dashboard.
Lab-GrownMay 08, 2026
NDC Publicly Criticizes Pandora Over ‘Misleading’ Natural Diamond ClaimsNDC said in an open letter that Pandora’s statements about the carbon footprint of lab grown versus natural diamonds are inaccurate.
SourcingMay 08, 2026
Ronnie VanderLinden Takes Over as WDC President The diamantaire and industry leader succeeds Feriel Zerouki and said he will focus on being a “champion” for natural diamonds.
TrendsMay 08, 2026
Rihanna Chooses ‘Desert Diamonds’ for 2026 Met GalaShe wore our Piece of the Week, Glenn Spiro’s “Old Moghul Golconda” earrings, featuring fancy brown-yellow diamonds totaling 51.90 carats.
Events & AwardsMay 08, 2026
JA Announces 2026 CASE Award WinnersTwo pieces were named “Best in Show,” one from the retail category and one from the supplier category.
FinancialsMay 07, 2026
Brilliant Earth Appeals to Higher-Income Shoppers in Q1The jewelry retailer noted resilience among its higher-end customers while demand softened for its lower-priced offerings.
AuctionsMay 07, 2026
‘Spectacular’ Kashmir Sapphire Headlines Heritage Spring Jewelry SaleLed by the 6.59-carat sapphire, the sale garnered $9.7 million, a record total for a Heritage jewelry auction.
MajorsMay 07, 2026
Gannon & Scott Names New Regional Account ExecutiveIn his new role, sales specialist Billy Welshoff will focus on the eastern United States.
WatchesMay 07, 2026
Chrono24 Names New CEOJosé Gaztelu has been promoted to the role, which has been vacant since last year.
Events & AwardsMay 07, 2026
JA Accepting Applications for 2026 Scholarship ProgramIt has also opened the application period for the Seymour & Evelyn Holtzman Bench Scholarship through June 30.
SourcingMay 06, 2026
Canada’s Oldest Diamond Mine Faces Uncertain FutureThe owner of the Ekati mine, which opened in 1998, has filed for insolvency protection amid the significant decline in diamond prices.
FinancialsMay 06, 2026
Pandora to Add Carbon Footprint Info to Lab-Grown DiamondsThe company announced the change alongside its Q1 results, which showed that the jewelry brand’s year is off to a shaky start.
MajorsMay 06, 2026
Saks Global Begins Layoffs, Reorganization Plans Closer to ApprovalThe retailer will cut 16 percent of its corporate workforce as part of its plan to exit bankruptcy.
AuctionsMay 06, 2026
Steve McQueen’s Heuer Monaco Watch Heads to Sotheby'sOf the many examples used in the filming of “Le Mans,” this one is believed to have spent the most time on Steve McQueen’s wrist.
EditorsMay 05, 2026
This Ohio Designer’s Jewelry Made It to the Met GalaMegan Piccione dressed Lauren Wasser in layers of diamond jewelry, making her stand out in a crowd that included celebrities like Beyoncé.
SourcingMay 05, 2026
Doug Hucker Returns to His RootsFollowing decades of association leadership, the “semi-retired” colored gemstone expert is turning his focus to gemstone education.
