Stuller Hires Guy Borenstein as Senior Gemologist
He has relocated from Israel to Louisiana to lead its gemological laboratory.

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.
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.”
The Latest

Watch the webinar in which National Jeweler’s editors talk about jewelry market week trends and their predictions for the rest of 2022.

All proceeds up to $25,000 will benefit the It Gets Better Project, a nonprofit that supports LGBTQ+ youth.

Experience all the Italian Jewelry market has to offer in Las Vegas.

It’s a reminder that life is best lived with discretion.

The end-to-end software allows for real-time control over all sales, inventory, repairs, customer communications, and marketing.

Associate Editor Lenore Fedow shares her impressions of the Las Vegas Antique Jewelry & Watch Show and a few of her favorite finds.

Provide your customers with a seamless selling solution by partnering with Windsor Jewelers, Inc.

Sales were up 36 percent year-over-year in June and are pacing 24 percent ahead of last year at this point.

Kate Della Monica, a senior specialist in the Jewelry and Watches department, will relocate to the Sunshine State.

LVMH’s investment arm has taken a stake in Lusix, a lab-grown diamond company based in Israel.

Sotheby’s New York put a colorless diamond and a fancy deep orange-brown diamond up for sale last week, with mixed results.

Profits will help them recoup financial losses.

Retail veteran Alexis Nasard will step in as CEO on July 4.

The organization also extended the terms of Vice President Feriel Zerouki and Treasurer Ronnie VanderLinden.

After suffering a professional setback, columnist Peter Smith reflects on our ability to bounce back even when the hits keep on coming.

Glatz owned and operated Glatz Jewelers in Aliquippa, Pennsylvania for more than 40 years.

The organization will present three awards at its annual dinner, dance, and gala in October.

Former McKinsey partner Emily Yueh marks new president Evan Yurman’s first hire.

The New York jeweler also made the pop star’s wedding bands.

It’s predicted to sell for up to $484,000 during the Bonhams Hong Kong Jewels and Jadeite auction on June 22.

The recipient will receive up to $17,500 toward a tech-focused certification or program of their choice.

It’s as versatile as it is glamorous.

The alleged scheme involving fake “Love” bracelets, necklaces and rings was designed to circumvent Amazon’s counterfeit detection tools.

Chief Financial Officer Brad Hampton will take over as the retailer’s new CEO.

Its new collection with subtle swirl designs draws inspiration from the family’s Armenian roots.