Step inside the nearly 21,000-square-foot suburban Chicago jewelry store with Editor-in-Chief Michelle Graff.
GIA Examines 5- and 10-Carat Lab-Grown Diamonds
The laboratory said the 5.19-carat diamond represents a “significant milestone” in CVD diamond growing.
Carlsbad, Calif.--The Gemological Institute of America recently examined two large lab-grown diamonds submitted to its Hong Kong lab, one of which represents a “significant milestone” in diamond growing.
In a research article authored by Billie “Pui Lai” Law and Wuyi Wang, the GIA said it recently examined a 5.19-carat diamond grown using the chemical vapor deposition process.
The stone, which is J-equivalent color and VS2-equivalent clarity, is the largest CVD-grown diamond examined by the lab to date, and the largest ever reported in the jewelry industry.
Breaking the 5-carat barrier is a “significant milestone” for CVD technology, which has been producing bigger diamonds in recent years, a trend that’s expected to continue.
As the GIA noted, “As diamond growth techniques continue to advance, we expect to see more high-quality samples, both in size and clarity.”
The article also stated that the 5.19-carat diamond was submitted to the lab without proper disclosure.
However, the GIA was able to identify it as a CVD synthetic using its standard screening and testing processes, though the lab noted that black inclusions, which often are contained in synthetic diamonds, were not found in this CVD diamond, meaning it could have been mistaken as a mined diamond if only microscopic examination was used.
The identification of this lab-grown diamond “highlights the importance of using advanced spectroscopic instruments as well as conventional gemological techniques to ensure an accurate identification,” the GIA said.
The second article, authored by Wang and Terry “Ping Yu” Poon, discussed the examination of a 10.08-carat blue diamond grown by St. Petersburg, Russia-based New Diamond Technology. NDT is the same company that grew the 5.03-carat blue diamond examined by the GIA’s New York laboratory earlier this year.
Grown using the high-pressure, high-temperature method and disclosed as a synthetic diamond by NDT, the stone is the largest HPHT-grown diamond recorded to date.
The GIA said the emerald-cut stone has a color grade equivalent to fancy deep blue.
The Latest
These punk-inspired earrings from the new Canadian brand’s debut collection reveal the alter ego of the classic pearl.
The company brings its nanotechnology to two new fancy cuts for diamonds that feature its signature color and brilliance.
From protecting customer data to safeguarding inventory records, it's crucial to learn how to tackle cybersecurity challenges.
Sponsored by Tasha R
Three Titanic survivors presented him with the personalized Tiffany & Co. timepiece about a year after the tragedy.
A federal court found that the jewelry store chain violated terms of the settlement reached after it was accused of defrauding customers.
This fall, sharpen your skills in jewelry grading, quality control and diamond assessment.
Cynthia Erivo chose Dreams of Hope, an organization dedicated to empowering LGBTQA+ youth, as the charity for this year’s collection.
The new space was designed to evoke a warm, inviting vibe.
Kinney, who spent nearly 30 years at IJO, has been hired to head Abbott Jewelry Systems’ new virtual marketplace.
The auction house was accused of helping clients avoid paying taxes on millions of dollars’ worth of art purchased from 2010 to 2020.
The four finalists will present their pieces at the 2025 JCK Las Vegas show.
The “Camera Oscura” collection showcases earring designs celebrating female Surrealist artists Claude Cahun and Leonor Fini.
The money will fund the planting of 10,000 trees in critical areas across Oregon, Arizona, Montana, and other regions.
The event centered on advancing jewelry manufacturing technology will return to Detroit in May 2025.
Local reports identified the woman as the wife of the jewelry store owner.
A collection of pieces owned by Ferdinand I, the first king of modern Bulgaria, and his family, blew away estimates in Geneva last week.
The Australian jewelry box brand’s new West Village store will showcase new jewelers each month through its Designer in Residence program.
“Lovechild” was created in partnership with Carolyn Rafaelian’s Metal Alchemist brand.
Hampton discussed how Helzberg is improving the customer experience and why it was inspired by the company formerly known as Dunkin’ Donuts.
The group will host several curated events and an exhibition of designer jewelry made with Peruvian gold traceable to the miners’ names.
The collection honors the 50th anniversary of Dolly Parton’s “Love is Like a Butterfly” song, which shares a birth year with Kendra Scott.
This year’s theme asks designers to take inspiration from classic fairy tales.
Senior Editor Lenore Fedow makes the case for why more jewelers should be appealing to nerds at the annual event.
The latest “Raiz’in” drop showcases a newly designed “Scapular” necklace and donates a portion of the proceeds to Make-A-Wish France.
No. 1 out of 100, the timepiece was created to mark Citizen’s 100th anniversary and will be auctioned off at Sotheby’s next month.