EditorsJan 16, 2026
Remembering Pete Yantzer for His Contributions and His Kindness Pete’s boundless curiosity extended beyond diamond cut and he was always eager to share his knowledge with others, no matter the topic.
SourcingSep 28, 2016
London Museum to Put 9,381-Carat Blue Topaz on Display
On long-term loan from the family who discovered it in Brazil, “The Ostro Stone” will be available for public viewing at the Natural History Museum starting Oct. 19.
The 9,381-carat blue topaz at center, dubbed “The Ostro Stone,” was discovered in 1960 in Minas Gerais, Brazil, by British gemstone pioneer and explorer Max Ostro.
London--The U.K. will present a unique opportunity for gemstone lovers beginning next month as a flawless, faceted blue topaz, thought to be the largest of its kind, goes on display.
Starting Oct. 19, a 9,381-carat blue topaz called “The Ostro Stone” will go on permanent display to the public in the London Natural History Museum’s Minerals gallery.
British gemstone pioneer and explorer Max Ostro discovered the stone in its natural form in 1960 in Minas Gerais, Brazil, and the topaz has been in the family vault ever since. It is being put on display now through a long-term loan from his son, Maurice Ostro, chairman of Ostro Minerals.
It’s approximately 6 inches in length and 4 inches wide, with its deep blue color resulting from a treatment applied when it was in its rough state.
The museum said it’s the first large cut topaz of its kind to go on display there, showing alongside other important specimens from its mineral collections. It did not disclose the value of the stone.
The Ostro Stone will be unveiled at a private launch event in the Museum’s Hintze Hall on Oct. 6, with performances from fashion designer Daphne Guinness and music producer Tony Visconti.
Three new pieces of “wearable art” featuring topaz donated by Ostro and designed by contemporary artists Isaac Julien, Nicole Wermers and Catherine Yass also will be unveiled.
Though at the start of his career in the gemstone world Max Ostro was responsible for introducing a number of gems from South America to the colored stone industry in the Far East, he was long enthralled with blue topaz in particular, working closely with it until his death in 2010.
He has been credited with helping the gem reach the popularity it has to day, and the terms London blue and Swiss blue also are associated with the Ostro family.
Mike Rumsey, senior curator of the museum’s Minerals Collection, said, “This stone is an excellent example of how as humans, we have crafted beautiful and desirable objects from the natural mineral specimens we find around us, like those that we preserve in the collections at the museum. It will be on display alongside some of our world leading collection of minerals and gems, which is studied by scientists here to find new sources of minerals, gemstones and metals.”
Editors' Picks
Sponsored by
More on Sourcing
The Latest
FinancialsJan 16, 2026
Richemont’s Jewelry Brands Shine in Q3Cartier, Van Cleef & Arpels, Buccellati, and Vhernier had another successful holiday season, Richemont reported this week.
TrendsJan 16, 2026
Diane Lane's Brooch Buzzes at the 2026 Golden GlobesOur Piece of the Week is Lagos’ “Bee” brooch that was seen on the red carpet for the first time on Sunday.
Brought to you by
How Jewelers Can Fight Back Against Cell JammersCriminals are using cell jammers to disable alarms, but new technology like JamAlert™ can stop them.
CrimeJan 15, 2026
D.C. Rapper ‘Taliban Glizzy’ Sentenced to 18+ Years for Jewelry Store RobberiesTrevor Jonathan Wright led a crew in a string of armed robberies targeting South Asian-owned jewelry stores on the East Coast.
Weekly QuizJan 15, 2026
This Week’s QuizTest your jewelry news knowledge by answering these questions.
Events & AwardsJan 15, 2026
Jewelers of Americas’ ‘20 Under 40’ Nominations Now OpenThe program recognizes rising professionals in the jewelry industry.
Events & AwardsJan 15, 2026
Registration for JCK Las Vegas 2026 Is Now OpenA new lifestyle section and a watch showcase have been added to this year’s event.
Brought to you by
Impacting Tomorrow TodayHow Jewelers of America’s 20 Under 40 are leading to ensure a brighter future for the jewelry industry.
TrendsJan 15, 2026
Don’t Double-Dip With This Golden ChipAvocados From Mexico is celebrating those who love to double-dip in game day guacamole with a 14-karat yellow gold tortilla chip necklace.
CollectionsJan 14, 2026
Marie Lichtenberg Lassos Leather for New BraceletsThe brand is trading its colorful fabric cords for Italian leather in its “Lasso” baby locket bracelets.
TechnologyJan 14, 2026
“My Next Question” Enters Its Podcast Era National Jeweler and Jewelers of America’s popular webinar series is evolving in 2026.
MajorsJan 14, 2026
Saks Files for Bankruptcy, Names New CEOThe department store chain owes millions to creditors like David Yurman, Roberto Coin, Kering, and LVMH.
CollectionsJan 14, 2026
Boucheron Names Colman Domingo as Brand AmbassadorThe award-winning actor’s visionary approach and creativity echo the spirit of Boucheron, the brand said.
IndependentsJan 14, 2026
Kansas Jeweler Wins 2025 ‘Wag’ AwardEdge Retail Academy honored Burnell’s Fine Jewelry in Wichita, Kansas, with its annual award for business excellence.
ColumnistsJan 13, 2026
2025 Was a ‘Price Up, Units Down’ Year, Here’s What That Signals for 2026 In a market defined by more selective consumers, Sherry Smith shares why execution will be independent jewelers’ key to growth this year.
IndependentsJan 13, 2026
Orr’s Jewelers Opens New Location in Pittsburgh’s Strip DistrictThe family-owned jeweler’s new space is in a former wholesale produce market.
CrimeJan 13, 2026
Alleged Getaway Driver Charged in Florida Jewelry Store RobberyIvel Sanchez Rivera, 52, has been arrested and charged in connection with the armed robbery of Tio Jewelers in Cape Coral, Florida.
Events & AwardsJan 13, 2026
NYC Jewelry, Antique, & Object Show Announces Winter EventThe new show will take place Jan. 23-25, 2026.
PodcastsJan 12, 2026
Introducing My Next Question, the PodcastA monthly podcast series for jewelry professionals
EditorsJan 12, 2026
Platinum, White Gold Rule the 2026 Golden GlobesAssociate Editor Natalie Francisco highlights her favorite jewelry moments from the Golden Globes, and they are (mostly) white hot.
GradingJan 12, 2026
Peter Yantzer, Former Executive Director of AGS Labs, Dies at 77 Yantzer is remembered for the profound influence he had on diamond cut grading as well as his contagious smile and quick wit.
MajorsJan 12, 2026
These 14 Macy’s Locations Will Close This YearThe store closures are part of the retailer’s “Bold New Chapter” turnaround plan.
MajorsJan 12, 2026
Jewelers Mutual Acquires AI-Powered Event Insurance ProgramThrough EventGuard, the company will offer event liability and cancellation insurance, including wedding coverage.
MajorsJan 09, 2026
Kendra Scott Taps Activewear Exec as CEO Chris Blakeslee has experience at Athleta and Alo Yoga. Kendra Scott will remain on board as executive chair and chief visionary officer.
SurveysJan 09, 2026
U.S. Holiday Retail Sales Up 4%, Visa, Mastercard SayThe credit card companies’ surveys examined where consumers shopped, what they bought, and what they valued this holiday season.
AuctionsJan 09, 2026
Christie’s Names New Global Managing Director for LuxuryKimberly Miller has been promoted to the role.
CollectionsJan 09, 2026
Piece of the Week: Lionheart’s ‘Serenity’ Opal CharmThe “Serenity” charm set with 13 opals is a modern amulet offering protection, guidance, and intention, the brand said.
