MajorsMay 17, 2021
Pandora’s Head of North America Steps DownGradingMay 26, 2021
Stuller Hires Guy Borenstein as Senior Gemologist
He has relocated from Israel to Louisiana to lead its gemological laboratory.
Industry veteran Guy Borenstein has been named senior gemologist at Stuller, leading the supplier’s gem lab.
Lafayette, La.—Industry veteran Guy Borenstein has joined Stuller’s team.
The supplier named him senior gemologist; he will be the lead gemological authority for the company.
Borenstein succeeds Mike Turner in the role, who passed away suddenly in December 2019.
He and his family have relocated from Israel to Lafayette, Louisiana, where Stuller is headquartered.
He started working there in early May, the company confirmed, where he leads the gemological laboratory, which sits alongside its in-house GIA Melee Analysis service lab and its team of diamond and gemstone experts.
Its lab contains advanced gemological equipment that allows them to screen for and detect undisclosed lab-grown diamonds.
Related stories will be right here …
The supplier named him senior gemologist; he will be the lead gemological authority for the company.
Borenstein succeeds Mike Turner in the role, who passed away suddenly in December 2019.
He and his family have relocated from Israel to Lafayette, Louisiana, where Stuller is headquartered.
He started working there in early May, the company confirmed, where he leads the gemological laboratory, which sits alongside its in-house GIA Melee Analysis service lab and its team of diamond and gemstone experts.
Its lab contains advanced gemological equipment that allows them to screen for and detect undisclosed lab-grown diamonds.
Borenstein’s role at Stuller will help the company comply with RJC Code of Practices and FTC rules regarding product integrity, a spokesperson for the company confirmed.
He joined Stuller with 15 years of experience in various gemological disciplines, including serving as the vice president of gemological services at Gemewizard and chief gemologist at EGC and GWLAB laboratories.
He is a Gemmological Association of Great Britain FGA and holds an EGG (E.G.L. Graduate Gemologist) diploma from the European Gemological College.
“Guy is a world-class talent, highly respected among leading gemologists, and we are fortunate to have him join the Stuller team,” said Stanley Zale, vice president of diamond and gemstone procurement at Stuller.
“He is a great addition to our team. His knowledge and skills will help us continue to lead the industry with robust programs that best ensure the integrity of our products.”
He joined Stuller with 15 years of experience in various gemological disciplines, including serving as the vice president of gemological services at Gemewizard and chief gemologist at EGC and GWLAB laboratories.
He is a Gemmological Association of Great Britain FGA and holds an EGG (E.G.L. Graduate Gemologist) diploma from the European Gemological College.
“Guy is a world-class talent, highly respected among leading gemologists, and we are fortunate to have him join the Stuller team,” said Stanley Zale, vice president of diamond and gemstone procurement at Stuller.
“He is a great addition to our team. His knowledge and skills will help us continue to lead the industry with robust programs that best ensure the integrity of our products.”
More on Grading
The Latest
CollectionsOct 02, 2025
Boucheron Debuts Cuffs Crafted With 3D-Printed SandIts “Quantre Sand” capsule was made using a 3D sand printing technique borrowed from the automotive and aeronautics industries.
CrimeOct 02, 2025
$1M in Jewelry Stolen in Northern California Smash and Grab Four individuals have been charged in the “takeover-style” robbery of Heller Jewelers last month, and additional charges are expected.
MajorsOct 02, 2025
Neil Lane Jewelry Exhibition Coming to Toledo Museum of Art“Radiance and Reverie” will showcase more than 150 jewels from Lane’s personal collection by Tiffany & Co., Cartier, and more.
TrendsOct 02, 2025
Amanda’s Style File: October’s Colorful ShowThe month’s birthstones, tourmaline and opal, complement the palette of autumn.
Weekly QuizOct 02, 2025
This Week’s QuizTest your jewelry news knowledge by answering these questions.
ColumnistsOct 01, 2025
Peter Smith: Why Vendor Success Starts With Self-ReflectionSmith shares the importance of looking at your company with openness and honesty to identify opportunities you may be missing.
EditorsOct 01, 2025
Playing Favorites: The Best Jewelry From VicenzaoroAssociate Editor Natalie Francisco visited Italy to spot jewelry trends at the September Vicenzaoro show and share her top finds.
Brought to you by
reDollar.com Is Rolling Out the Next Level Jewelry, Diamond & Watch Consignment ProgramWith their unmatched services and low fees, reDollar.com is challenging some big names in the online consignment world.
SurveysOct 01, 2025
Consumer Confidence Hits 5-Month Low in September Respondents were concerned about job availability and rising prices.
SourcingOct 01, 2025
Gemfields’ H1 Revenue Falls 47%Its latest interim financials revealed a challenging first half due in part to production troubles at its mines.
MajorsSep 30, 2025
Pandora CEO to Retire in 2026, Hand Reins to CMO Alexander Lacik has led Pandora since 2019. Berta de Pablos-Barbier will succeed him, the first woman to head the company.
CrimeSep 30, 2025
2 Suspects Charged in $300K Sleight-of-Hand Jewelry Store ScamTwo men allegedly used counterfeit bills to purchase luxury watches and jewelry from a North Carolina jeweler.
CollectionsSep 30, 2025
Billie Eilish, Finneas Partner with John HardyThe “Lovestruck” collection, designed with the Academy and Grammy award-winning siblings, is the brand’s first lab-grown diamond offering.
IndependentsSep 30, 2025
Spinelli Kilcollin Announces Residency in DallasThe brand, celebrating its 15th anniversary, has popped up at Market, a luxury fashion destination in Highland Park Village.
IndependentsSep 29, 2025
Nina Pugliese, Longtime Henne Jewelers Employee, Dies at 65She was remembered as a creative and generous woman of faith, who also had a sweet tooth.
TrendsSep 29, 2025
Amanda’s Style File: Ear FocusMove over neck mess, the ear story is the way to make a layering statement today.
IndependentsSep 29, 2025
Mark Henry Jewelry to Debut in CanadaThe New York-based brand is set to launch a limited-time offering for the holiday season at Holt Renfrew in Toronto.
MajorsSep 29, 2025
Overnight Releases New Bridal CatalogThe “Volume 7” bridal catalog features best-selling engagement rings, trending styles, and a new section highlighting anniversary bands.
SurveysSep 26, 2025
Online Shopping, Influencers to Drive Holiday Spending, Mastercard SaysHoliday sales growth is expected to slow as consumers grapple with inflation and tariff-related uncertainty.
Events & AwardsSep 26, 2025
Winners of Austin Jewelry Design Contest Announced Jamie Turner Designs is among the winners of the local “Austin Shines” contest, hosted by Eliza Page, a jewelry store in Austin, Texas.
TrendsSep 26, 2025
Piece of the Week: Kwit Jewelry’s Square Signet Pinky RingThe red and azure colorway is one of many fun enamel pairings offered, bringing whimsy to the classic style of a monogramed signet ring.
Policies & IssuesSep 25, 2025
JA CEO Provides Tariff Update Following Annual Fly-InA trade deal with Switzerland seems probable, but reaching an agreement with India remains a challenge, David Bonaparte said.
SourcingSep 25, 2025
2 African Countries Aim to Take Stake in De Beers Botswana’s president said his country wants a controlling share, while Angola envisions multiple countries holding minority stakes.
Lab-GrownSep 25, 2025
Kira Jewels Expands Lab-Grown Diamond ProductionThe manufacturer is adding 1,400 chemical vapor deposition (CVD) reactors to its growing facility in India.
IndependentsSep 25, 2025
Alex Moss’ New Flagship Brings Bold Jewels to SoHoThe jeweler to the stars has worked with Drake, A$AP Rocky, Tyler the Creator, and other celebrities.
WatchesSep 25, 2025
Wilson & Son Jewelers Donates to the Horological Society of New YorkThe Scarsdale, New York-based jeweler donated a professional-grade watch cleaning machine.
Policies & IssuesSep 24, 2025
Tariffs Throw Diamond Trade Into DisarrayThe 50 percent tariffs on diamonds shipped from India to the U.S. have pushed midstream manufacturers to the edge.
