ColumnistsJul 28, 2026
Peter Smith: Why Your Job Postings May Be Working Against You Smith reveals the method The Retail Smiths use to help retailers and vendors write better job postings.
SourcingFeb 01, 2022
Johnny Kneller, an Expert on the Exceptional, Dies at 75
He was a close friend and business partner of Laurence Graff, who described him as “the greatest diamond dealer I have ever known.”
Large-stone expert Johnny Kneller, a lifelong diamantaire and partner of Brian Gutkin and Laurence Graff at Safdico, died Jan. 20 at the age of 75. (Photo courtesy of Yves Alexis)
Antwerp—Johnny Kneller, a man who “lived and breathed diamonds all his life,” succumbed to cancer on Jan. 20.
He was 75.
Kneller was born in 1946 in Prague, then in Czechoslovakia. He was the son of diamond trader who specialized in large stones.
Kneller grew up in Antwerp and followed in his father’s footsteps, eventually becoming an expert on big diamonds and polishing “countless” important rough stones, according to information provided by his son-in-law, Yves Alexis.
This includes the 603-carat Lesotho Promise, the 709-carat Peace Diamond, and the 1,109-carat Lesedi La Rona.
“He really loved the stones,” Alexis said. “[He loved] the material, to see the color, appreciate the cut, life and sparkle.”
Kneller was also one of the first diamond manufacturers to forge a “true alliance” with an extremely well-known high-end jeweler—Laurence Graff.
The two formed their partnership in the late 1990s, with Kneller bringing the high-end jeweler in as a partner at Safdico, the diamond manufacturing firm Kneller and Brian Gutkin started in the ‘80s.
In a statement shared with National Jeweler, Graff described Kneller as his best friend and business partner. The two were friends for five decades and traveled the world together for their diamond manufacturing business.
Graff said Kneller was a great partner with a vast, almost unparalleled knowledge of both rough and polished diamonds.
He had a “uncanny” way of finding exceptional gems, whether rough or polished, that ended up in Graff stores around the world.
Outside of the diamond business, both men also shared an interest in fine art. Graff said while Kneller had knowledge of art history that spanned decades, he was a collector of contemporary pieces.
The two had regular Sunday morning chats about diamond mines, production and manufacturing, as well as what works of art were up for sale.
“I will miss him immensely,” Graff said. “I loved him as family. A special intellectual, reserved, kind and considerate man, he lived and breathed diamonds all his life. For me, he was the greatest diamond dealer I have ever known.”
Kneller is survived by his wife, Delly; two daughters, Katya and Julie; and six grandchildren.
He was 75.
Kneller was born in 1946 in Prague, then in Czechoslovakia. He was the son of diamond trader who specialized in large stones.
Kneller grew up in Antwerp and followed in his father’s footsteps, eventually becoming an expert on big diamonds and polishing “countless” important rough stones, according to information provided by his son-in-law, Yves Alexis.
This includes the 603-carat Lesotho Promise, the 709-carat Peace Diamond, and the 1,109-carat Lesedi La Rona.
“He really loved the stones,” Alexis said. “[He loved] the material, to see the color, appreciate the cut, life and sparkle.”
Kneller was also one of the first diamond manufacturers to forge a “true alliance” with an extremely well-known high-end jeweler—Laurence Graff.
The two formed their partnership in the late 1990s, with Kneller bringing the high-end jeweler in as a partner at Safdico, the diamond manufacturing firm Kneller and Brian Gutkin started in the ‘80s.
In a statement shared with National Jeweler, Graff described Kneller as his best friend and business partner. The two were friends for five decades and traveled the world together for their diamond manufacturing business.
Graff said Kneller was a great partner with a vast, almost unparalleled knowledge of both rough and polished diamonds.
He had a “uncanny” way of finding exceptional gems, whether rough or polished, that ended up in Graff stores around the world.
Outside of the diamond business, both men also shared an interest in fine art. Graff said while Kneller had knowledge of art history that spanned decades, he was a collector of contemporary pieces.
The two had regular Sunday morning chats about diamond mines, production and manufacturing, as well as what works of art were up for sale.
“I will miss him immensely,” Graff said. “I loved him as family. A special intellectual, reserved, kind and considerate man, he lived and breathed diamonds all his life. For me, he was the greatest diamond dealer I have ever known.”
Kneller is survived by his wife, Delly; two daughters, Katya and Julie; and six grandchildren.
More on Sourcing
The Latest
FinancialsJul 28, 2026
Tiffany & Co., Bulgari Lead the Way for LVMH in H1LVMH’s jewelry and watch brands outperformed the company’s other divisions in an environment the company described as “disrupted.”
CollectionsJul 28, 2026
Lionheart’s New Collection Unites Spiritual Iconography“Sacred Heart” features symbols like crosses, angel wings, the Star of David, and the evil eye as a representation of coexistence.
Brought to you by
Why More Jewelry Retailers Are Hosting Turnkey Estate Buying EventsRetailers are seeking new ways to attract customers, increase traffic, and create revenue – Estate buying events are a popular solution.
Events & AwardsJul 28, 2026
The Edge Funding 2 Scholarships Via 24 Karat Club SEUS The scholarships will go to early-career professionals looking to study gemology, bench work and jewelry design, or store operations.
Weekly QuizJul 23, 2026
This Week’s QuizTest your jewelry news knowledge by answering these questions.
SurveysJul 27, 2026
Jewelry Leads Luxury Market Amid Stabilization, Bain SaysBain & Company delved into the trends shaping the luxury market, the impact of AI, and more in its recent study.
Policies & IssuesJul 24, 2026
New Trump Tariffs: What They Mean for Jewelry The new sweeping slate of tariffs impacts 60 countries, including India, China, Thailand, Hong Kong, and the United Arab Emirates.
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.
TrendsJul 24, 2026
Amanda’s Style File: Ode to ‘The Odyssey’From coin pendants to diamond shields, these old world-inspired jewels are the perfect accessory for an epic journey.
TrendsJul 24, 2026
Courtney Leidy’s Silk Cord Pendants Center Unexpected Pairings Our Piece of the Week pairs a checkerboard-cut amethyst with an ivy green silk cord.
PodcastsJul 23, 2026
Episode 7: Reinhold Jewelers on the Power of RelationshipsMildred Marcano Abrams and Yael Reinhold join the podcast to talk community connections, holiday plans, and preserving Reinhold’s legacy.
CollectionsJul 23, 2026
Silvia Furmanovich’s New Collection Travels Back to the 1920s“Art Deco” fuses ancestral techniques, rare materials, and modern perspectives as a tribute to the optimism and curiosity of the movement.
IndependentsJul 23, 2026
Sissy's Log Cabin Opens Casino StoreThe jeweler’s newest store is inside Arkansas’ Saracen Casino Resort.
WatchesJul 23, 2026
Movado Inks Licensing Deal With Kate Spade New YorkThe watch company will design, manufacture, and distribute Kate Spade New York watches.
Policies & IssuesJul 22, 2026
Trump to Put 50% Tariff on Canadian Goods The higher tax is set to go into effect in August and will apply to loose polished diamonds as well as precious and base metals jewelry.
CollectionsJul 22, 2026
Monica Rich Kosann’s High Jewelry Is FruitfulThe “Enchanted Garden” series features a cherry, lemon, and pear that each hold a little secret inside.
IndependentsJul 22, 2026
Liljenquist Beckstead Opens Rolex New BoutiqueIt’s located in Tysons Galleria, an upscale shopping center in the Washington, D.C., metro area.
Events & AwardsJul 22, 2026
NY Now Returns in August Under New OwnershipThe show, recently acquired by Rockview Management Group, will be held at New York City’s Javits Center from Aug. 2-4.
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.
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.
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.
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.
