GradingFeb 08, 2024
GIA Helps Recover Stolen DiamondsGradingMar 26, 2024
IGI Announces Tech for ID’ing Lab-Grown Colored Diamonds
The lab stresses the importance of accurate identification, as the difference in price is “substantial.”
The International Gemological Institute has a new screening method for telling lab-grown fancy- colored diamonds from natural ones.
New York—The International Gemological Institute has announced a new technology for identifying lab-grown fancy-colored diamonds.
Screening devices for colorless natural and lab-grown diamonds, like the lab’s “IGI D-check,” commonly are based on photo luminescence. The machine captures the signature fluorescence and phosphorescence exhibited by a diamond under ultraviolet light of a shorter wavelength to determine the source of creation.
This type of screening is not suitable for identifying lab-grown fancy-colored diamonds, as these stones are often treated with irradiation, heat, pressure, or a combination of all three, which alters the fluorescence and phosphorescence.
After extensive study, IGI established a common set of procedures for each color category.
The new type of screening can distinguish between natural and lab-grown fancy-colored diamonds, and it uses advanced techniques like fourier-transform infrared spectroscopy (FTIR) and photoluminescence spectroscopy, along with magnification.
“IGI uses the latest technology to ensure that each diamond is graded accurately and identified correctly as natural, or lab grown,” IGI CEO Tehmasp Printer said.
“With lab-grown fancy-colored diamonds gaining momentum and the differential pricing being substantial, it’s imperative that the screening is done by a reputed laboratory like IGI.”
IGI can identify lab-grown and natural fancy-colored diamonds loose, in parcels, or mounted in jewelry.
Printer added, “We had a few cases in recent times where there has been a contamination of natural fancy-colored pink diamonds mixed with lab-grown pink diamonds. We strive to ensure that consumers have the right to accurate and authentic information about the diamonds they are purchasing.”
The lab said it has continuously evolved and shared its testing methods and techniques on a global level to ensure every diamond is accurately tested.
Related stories will be right here …
Screening devices for colorless natural and lab-grown diamonds, like the lab’s “IGI D-check,” commonly are based on photo luminescence. The machine captures the signature fluorescence and phosphorescence exhibited by a diamond under ultraviolet light of a shorter wavelength to determine the source of creation.
This type of screening is not suitable for identifying lab-grown fancy-colored diamonds, as these stones are often treated with irradiation, heat, pressure, or a combination of all three, which alters the fluorescence and phosphorescence.
After extensive study, IGI established a common set of procedures for each color category.
The new type of screening can distinguish between natural and lab-grown fancy-colored diamonds, and it uses advanced techniques like fourier-transform infrared spectroscopy (FTIR) and photoluminescence spectroscopy, along with magnification.
“IGI uses the latest technology to ensure that each diamond is graded accurately and identified correctly as natural, or lab grown,” IGI CEO Tehmasp Printer said.
“With lab-grown fancy-colored diamonds gaining momentum and the differential pricing being substantial, it’s imperative that the screening is done by a reputed laboratory like IGI.”
IGI can identify lab-grown and natural fancy-colored diamonds loose, in parcels, or mounted in jewelry.
Printer added, “We had a few cases in recent times where there has been a contamination of natural fancy-colored pink diamonds mixed with lab-grown pink diamonds. We strive to ensure that consumers have the right to accurate and authentic information about the diamonds they are purchasing.”
The lab said it has continuously evolved and shared its testing methods and techniques on a global level to ensure every diamond is accurately tested.
IGI said it foresaw the increase in demand for lab-grown diamonds in 2008 and was the first global laboratory to include certification for lab-grown diamonds.
“IGI has developed the ‘D-check’ in the interest of transparency and peace of mind for the industry and consumers alike,” said Printer.
“Our commitment to accuracy and transparency in the certification process is reflected in strict adherence and regular calibration of our international standards and testing methods across our worldwide locations. In addition to lab-grown certification services, IGI also provides comprehensive certification for loose diamonds, jewelry, and colored stones.”
To learn more about IGI and its other offerings, visit the lab’s website.
More on Grading
The Latest
Policies & IssuesMay 29, 2025
Trade Court Declares Trump’s Tariffs InvalidThree federal judges ruled that Trump exceeded his authority in imposing sweeping tariffs, a ruling his administration already has appealed.
CollectionsMay 29, 2025
Britney Spears Files Trademark for New Jewelry LineThe pop icon is one step closer to launching her “B Tiny” jewelry collection, a collection she first began posting about last fall.
Supplier BulletinMay 29, 2025
Inoveo Platinum Grain, Exclusively Distributed by StullerSponsored by Stuller
Brought to you by
Clienteling Isn’t a Buzzword. It’s an Essential Business Model.More shoppers are walking out without buying. Here’s how smart jewelers can bring them back—and the tool they need to do it right.
SourcingMay 29, 2025
Grizzly Auctions 6,620-Carat EmeraldIt was featured in the miner’s latest sale, which brought in $24.8 million.
Weekly QuizMay 22, 2025
This Week’s QuizTest your jewelry news knowledge by answering these questions.
TechnologyMay 29, 2025
GemFind Launches AI Product Description SoftwareGemText AI uses artificial intelligence to generate tailored product titles, descriptions, and tags with jewelry-specific language.
MajorsMay 28, 2025
Graff Unveils New Las Vegas FlagshipThe 3,300-square foot location is the jeweler's largest store in North America.
Brought to you by
Las Vegas Antique Jewelry & Watch Show: Showcasing the Most Collectible Merchandise from Across the GlobeGain access to the most exclusive and coveted antique pieces from trusted dealers during Las Vegas Jewelry Week.
CrimeMay 28, 2025
8 Convicted in Kim Kardashian Jewelry Heist TrialAging and with myriad health issues, none will serve time for their roles in robbing the billionaire celebrity at gunpoint in 2016.
CollectionsMay 28, 2025
NY Liberty’s 2024 Championship Rings Honor Historic WinThe WNBA team received rings imbued with meaning, from leaf motifs and its Liberty torch to the number of diamonds used.
MajorsMay 28, 2025
Andrew Rickard Named JBT PresidentA longtime executive at RDI Diamonds, Rickard has served on the JBT board for the past five years.
MajorsMay 27, 2025
MJSA to Become Part of Jewelers of America The two organizations have signed an affiliation agreement that’s expected to be finalized in the coming weeks.
AuctionsMay 27, 2025
Al Capone’s Patek Philippe Pocket Watch Back Up for AuctionThe platinum and diamond watch is part of Sotheby’s upcoming Important Watches sale.
AuctionsMay 27, 2025
182-Carat Paraíba-Type Tourmaline Sells for $487K Recovered in Mozambique, “The Kat Florence Lumina” was part of Bonhams’ Hong Kong jewelry auction held last week.
TrendsMay 27, 2025
Amanda’s Style File: Candy-Colored GemstonesGet a taste of the delicious candy-like gemstones in this Amanda’s Style File.
CrimeMay 23, 2025
JSA Shares Holiday Weekend Security Tips Amid Spike in BurglariesJSA’s Scott Guginsky provided a list of nine security measures jewelers should observe while locking up for the long weekend.
CollectionsMay 23, 2025
Piece of the Week: Bliss Lau’s ‘Bright’ RingFrom Lau’s “Love of a Kind” series, the engagement ring was inspired by the moon and holds a different meaning depending on how it is worn.
Supplier BulletinMay 22, 2025
How to Put Natural Diamonds Back in the SpotlightSponsored by GCAL by Sarine
CrimeMay 22, 2025
NY Jeweler Sentenced in Shoving Death of Colleague at IJO ShowDavid Walton will serve three years’ probation after an incident in a hotel bar led to the death of West Virginia jeweler David Ettinger.
FinancialsMay 22, 2025
Watches of Switzerland’s Full-Year U.S. Sales Climb 14% The retailer also provided an update on how the tariffs situation in the U.S. is affecting its business.
IndependentsMay 22, 2025
Adeler Jewelers Celebrates 50 YearsThe family-owned jeweler in Great Falls, Virginia, will be celebrating its golden jubilee with a year’s worth of events.
Events & AwardsMay 22, 2025
Jose Hess Design Awards Announce JudgesThe nonprofit elected five judges who will decide the winners of its design competition.
MajorsMay 22, 2025
MJSA Releases 2025-2026 Buyer’s GuideThis year’s edition includes articles on the favorite tools of notable designers, evaluating when to outsource production, and more.
CollectionsMay 21, 2025
Bulgari Highlights Its Colorful Past in Phenomenal ‘Polychroma’ CollectionThe jeweler’s high jewelry collection features extraordinary gemstones, like a 241.06-carat emerald and the world’s fourth-largest spinel.
ColumnistsMay 21, 2025
Edahn’s Take: Analyzing the 2025 ‘$100 Million Supersellers’ List In a special column for the State of the Majors, Edahn Golan breaks down what the top-performing fine jewelry sellers are doing right.
MajorsMay 21, 2025
Beyoncé Dons Brilliant Earth Necklace During Cowboy Carter TourThe bolo tie necklace is inspired by “Queen Bey” and set with a nearly 15-carat black diamond.
SourcingMay 21, 2025
Gem Legacy Expands Advisory CouncilThe nonprofit focused on mining communities in East Africa has added three new members to its advisory council.
