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.”

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.
The Latest

The “Sea of Wonder” collection features pieces inspired by the ocean, from its waves to flora and creatures like urchins and sea turtles.

The 23-carat fancy vivid blue diamond, set to headline Christie’s May jewelry auction, was expected to sell for as much as $50 million.

G.B. Heron Jewelers in Salisbury, Maryland, is set to close as its owner, Jeff Cassels, retires.

Supplier Spotlight Sponsored by GIA

Emmanuel Raheb outlines the differences between the two platforms and posits that the most successful jewelers use both.


The miner said its April sale featured a mix of commercial-quality primary rubies and secondary rubies of varying quality.

U.S. customs agents in El Paso, Texas, intercepted the package, which would have been worth $9 million if the jewelry was genuine.

Six new retail businesses were selected for the 2025 program, which began in January.

Health monitors become statement pieces when paired with the brand’s new collection of stackable diamond-studded bands.

Ten organizations were selected this year.

Kim Carpenter and Sam Gevisenheit have joined the brand.

“Shell Auranova” is the next generation of the brand’s bridal line, featuring half-bezel engagement rings with bold and fluid designs.

Boucheron and Pomellato performed well in an otherwise bleak quarter for Kering amid struggles at Gucci.

Designer Deborah Meyers created her birds from oxidized sterling silver, rose-cut diamond eyes, and Akoya Keshi pearl feathers.

The company said it expects sightholders to remain “cautious” with their purchasing due to all the unknowns around the U.S. tariffs.

Sponsored by the Gemological Institute of America

Simon Wolf shares why the time was right to open a new office here, what he looks for in a retail partner, and why he loves U.S. consumers.

A third-generation jeweler, Ginsberg worked at his family’s store, Ginsberg Jewelers, from 1948 until his retirement in 2019.

The company failed to file its quarterly reports in a timely manner.

The organization also announced its board of directors.

Charms may be tiny but with their small size comes endless layering possibilities, from bracelets to necklaces and earrings.

Located in Valenza, the now 355,000-square-foot facility includes a new jewelry school that’s open to the public, Scuola Bulgari.

Paola Sasplugas, co-founder of the Barcelona-based jewelry brand, received the Fine Jewelry Award.

A platinum Zenith-powered Daytona commissioned in the late ‘90s will headline Sotheby’s Important Watches sale in Geneva next month.

The basketball stars wear men’s jewelry from the “Curb Chain” collection.

The Signet Jewelers-owned retailer wants to encourage younger shoppers to wear fine jewelry every day, not just on special occasions.

The 21 pieces, all from a private collector, will be offered at its Magnificent Jewels auction next month.