GradingJun 08, 2021
International Gemological Institute Sets Out to Become Carbon NeutralGradingJun 14, 2021
IGI Finds 6-Carat ‘Natural’ Diamond Is Actually Lab-Grown
The submitted stone had been cut and polished with “meticulous precision” to match a natural diamond report, the lab said.
The lab-grown diamond report from the International Gemological Institute for a 6.18-carat stone recently submitted as a natural diamond
Bangkok—One gem lab recently found another lab-grown diamond submitted as a natural stone, and it’s a pretty big one.
The International Gemological Institute said it analyzed and graded a 6.18-carat round brilliant diamond stone at its Bangkok lab that had been submitted for verification.
It came with a report from the Gemological Institute of America stating it was a natural diamond of D color, flawless clarity, and triple excellent cut, but IGI established it was, in fact, a lab-grown diamond.
The lab’s gemologists realized the natural stone had been swapped with a lab-grown diamond, which had been cut and polished to match the GIA report’s data with “meticulous precision previously never seen.”
Additionally, the stone had been inscribed with a counterfeit report number, an issue GIA has been battling as of late.
Related stories will be right here …
The International Gemological Institute said it analyzed and graded a 6.18-carat round brilliant diamond stone at its Bangkok lab that had been submitted for verification.
It came with a report from the Gemological Institute of America stating it was a natural diamond of D color, flawless clarity, and triple excellent cut, but IGI established it was, in fact, a lab-grown diamond.
The lab’s gemologists realized the natural stone had been swapped with a lab-grown diamond, which had been cut and polished to match the GIA report’s data with “meticulous precision previously never seen.”
Additionally, the stone had been inscribed with a counterfeit report number, an issue GIA has been battling as of late.
IGI called the stone the largest lab-grown diamond to be certified by a gem lab in which “the sole purpose was to pass (it off) as natural,” and noted an increasing demand among consumers to be sure about the diamond they are purchasing.
“At IGI, we have seen a huge increase in double verification demand, which means before going for a major purchase, consumers like to receive confirmation that the stone matches the original report,” IGI Thailand and Hong Kong Managing Director Bob Van Es said.
“At IGI, we have seen a huge increase in double verification demand, which means before going for a major purchase, consumers like to receive confirmation that the stone matches the original report,” IGI Thailand and Hong Kong Managing Director Bob Van Es said.
More on Grading
The Latest
MajorsApr 02, 2026
Pandora Opens New Canadian Distribution Center Amid Tariff ConcernsThe new facility was also designed to better serve its growing customer base in Canada.
TrendsApr 02, 2026
Michelle Yeoh Fronts New Mikimoto Campaign The campaign is a tribute to the year 1893, when Kokichi Mikimoto created the world’s first cultured pearl.
MajorsApr 02, 2026
DCA Launches ‘Second Spark’ Workforce InitiativeThe initiative connects veterans and parents returning to the workforce with careers in jewelry retail.
Brought to you by
Protect Your Customers and Your BusinessYou deserve to know what you are selling–to protect your customers as well as your business and your reputation.
MajorsApr 02, 2026
Hoover & Strong Names New National Sales RepresentativeThe wholesale manufacturer and precious metals refiner has appointed Michael Angelo as its new national sales representative.
Weekly QuizApr 02, 2026
This Week’s QuizTest your jewelry news knowledge by answering these questions.
MajorsApr 01, 2026
Foundrae Sues Pandora for Allegedly Copying Its Medallion DesignsFoundrae also accused the jewelry giant of copying its mood board style of marketing.
AuctionsApr 01, 2026
John Jacob Astor IV’s Titanic Pocket Watch Heads to AuctionA Patek Philippe for Tiffany & Co. timepiece owned by the American businessman who died on the Titanic will be offered at Freeman's Chicago.
Brought to you by
Is This You? Every Jeweler Has This Problem; We Have the Solution.Every jeweler faces the same challenge: helping customers protect what they love. Here’s the solution designed for today’s jewelry business.
SurveysApr 01, 2026
Consumers’ Outlook Improves Again in MarchThe Conference Board’s Consumer Confidence Index edged up, with optimism about the present outweighing worries about the future.
IndependentsApr 01, 2026
Zachary’s Jewelers’ Constance Polamalu to Release Children’s BookThe retailer’s Zach Bear gift comes to life in “Zach Bear and the Window Necklace,” which centers on curiosity, bravery, and helping.
Events & AwardsApr 01, 2026
AGA Opens 2026 Gemological Scholarship, Research Grant ApplicationsApplications are open for the AGA Gemological Scholarship Program through May 15, and until June 2027 for the Gemological Research Grant.
ColumnistsMar 31, 2026
Q1 Clues That Reveal Where Your Jewelry Store’s Sales Are Heading These customer behavior patterns say a lot about how successful your jewelry store is going to be this year, Emmanuel Raheb writes.
CollectionsMar 31, 2026
Mejuri Adds Silver to ‘Puzzle’ CollectionMejuri’s popular collection of 18-karat yellow gold vermeil rings debuted in sterling silver alongside new “Puzzle” slider charms.
CollectionsMar 31, 2026
Buddha Mama, Ashley Longshore to Host Pop-Up in DallasThe Miami-based jewelry brand and the NYC-based artist will be in Dallas from April 9-11.
SourcingMar 31, 2026
NDC Designates April 8 as 'World Diamond Day'The initiative invites those in the industry to share stories on social media highlighting the meaning and impact of natural diamonds.
SourcingMar 31, 2026
GIA VP Jillian Wolk to Take Over at Tracr Wolk’s first day on the job as CEO of Tracr, De Beers Group’s blockchain platform, will be May 1.
EditorsMar 30, 2026
Tom Moses Looks Back on His Decades at GIA Moses, who will leave the lab in May after nearly 50 years, discusses his start in the business, gemstones that stand out, and what’s next.
TrendsMar 30, 2026
Oscar Heyman Debuts First Spring CatalogThe new catalog, which showcases 35 one-of-a-kind pieces of jewelry, is a compliment to the company’s popular holiday catalog.
SourcingMar 30, 2026
Rio Tinto Hauls Last Load from DiavikProduction has ceased at the Canadian diamond mine, which has yielded more than 150 million carats of rough diamonds in its 23-year run.
MajorsMar 30, 2026
Tanishq Opens First New England LocationThe store opening marks the 10th United States location for the India-based jewelry retailer.
MajorsMar 27, 2026
Saks Global Has Changed Its Mind About Closing These 3 StoresTwo Saks Fifth Avenue locations, one in Florida and one in California, and one Neiman Marcus store are off the chopping block.
IndependentsMar 27, 2026
Jimmy West, Longtime LJG Executive Director, Dies at 72West, who started in the art department at the Leading Jewelers Guild in 1979, is remembered for his patience, kindness, and dedication.
CollectionsMar 27, 2026
Itä’s ‘Yarí Whirl’ Ring Tells Every Side of the StoryIn the “Tesoro” version of the ring, our Piece of the Week, each side of the gold hexagonal nugget has a unique colored gemstone design.
WatchesMar 26, 2026
Q&A: Citizen Watch America President Jeffrey Cohen on Eco-Drive’s 50th AnniversaryCohen discusses the evolution of Citizen’s light-powered technology, the brand’s cross-generational appeal, and tariffs.
IndependentsMar 26, 2026
Peter Smith Pens Book on Human Behavior in Sales“Essentially Human: On Sales and Salespeople" reveals the underlying human traits and behaviors of the most successful sales professionals.
CollectionsMar 26, 2026
Lionheart Celebrates 13 Years of ‘Cassandane’The collection features symbols of love, luck, and light, based on the story of Queen Cassandane and Cyrus the Great of Persia.
Events & AwardsMar 26, 2026
NAJA, Instappraise Introduce New ScholarshipIt’s the third scholarship to be launched as part of the partnership to help appraisers advance their professional credentials.
