EditorsNov 22, 2024
Out & About: Inside the CD Peacock MansionStep inside the nearly 21,000-square-foot suburban Chicago jewelry store with Editor-in-Chief Michelle Graff.
GradingMay 22, 2019
GIA Spots Second Natural Diamond with Lab-Grown Layer
The stone is 0.64 carats and graded as a fancy grayish-greenish blue.
Gemological Institute of America researchers said the gray and blue components from the lab-grown layer of this diamond combined with the yellow from the natural substrate to create the color, fancy grayish-greenish blue. (Photo credit: Robison McMurtry)
Carlsbad, Calif.—GIA researchers recently spotted a second natural diamond with a lab-grown layer that added weight and improved the color, and warned that it could mean the trade will see more of these kind of composites.
According to an article by Troy Ardon and Garrett McElhenny in the spring 2019 edition of “Gems & Gemology,” the presence of both boron- and nitrogen-related defects—which are rarely seen together in natural diamonds—tipped them off there was something unusual about the stone.
The DiamondView fluorescence image of the diamond—a 0.64-carat fancy grayish-greenish blue cushion modified brilliant—showed a blue hue caused by the “cape” peak (nitrogen defect) and natural growth features.
The crown image, however, revealed a greenish-blue color common to boron-bearing diamonds and the dislocation patterns typically seen in diamonds grown using the chemical-vapor deposition (CVD) process.
In addition, a side view shows a distinct layer between the natural substrate and the CVD-grown portion of the stone. 
“These two distinct fluorescence patterns—the greenish-blue from the CVD layer and the darker blue from the naturally grown layer—prove that a layer of CVD synthetic diamond was grown on a natural substrate,” the article states.
A similar diamond, a 0.33-carat fancy blue that was also Type IIb with a CVD layer, was submitted to GIA in May 2017.
The CVD layer on this latest diamond is substantially thicker, 200 microns (approximately the thickness of two strands of human hairs) vs. 80 microns on the 0.33-carat diamond evaluated two years ago, and GIA noted that seeing a second example of this same type of composite could signal a new type of product entering the market.
The lab would not say if both diamonds came from the same client.
GIA also declined to comment on how the stones were submitted—as natural diamonds, or as natural/lab-grown composites—but did note that clients submitting goods are required to disclose all known treatments as well as whether a stone is natural or man-made.
To see more from the spring 2019 edition of “Gems & Gemology,” the Gemological Institute of America’s quarterly research journal, visit GIA.edu.
More on Grading
The Latest
CollectionsNov 22, 2024
Piece of the Week: Xander Jane’s ‘Spiked’ Pearl StudsThese punk-inspired earrings from the new Canadian brand’s debut collection reveal the alter ego of the classic pearl.
SourcingNov 22, 2024
Facets of Fire Expands to Include Pear, Marquise DiamondsThe company brings its nanotechnology to two new fancy cuts for diamonds that feature its signature color and brilliance.
Brought to you by
Navigating Cybersecurity: Essential Guidance for JewelersFrom protecting customer data to safeguarding inventory records, it's crucial to learn how to tackle cybersecurity challenges.
Supplier BulletinNov 21, 2024
Tasha R Releases 2025 Labbelle Lab Diamond Jewelry CatalogSponsored by Tasha R
Weekly QuizNov 21, 2024
This Week’s QuizTest your jewelry news knowledge by answering these questions.
AuctionsNov 21, 2024
Gold Watch Gifted to Titanic Rescue Ship Captain Sells for $2MThree Titanic survivors presented him with the personalized Tiffany & Co. timepiece about a year after the tragedy.
MajorsNov 21, 2024
Harris Jewelry Ordered to Reopen Claims Portal for Refund RequestsA federal court found that the jewelry store chain violated terms of the settlement reached after it was accused of defrauding customers.
Brought to you by
Enhance Your Expertise with IGI’s In-Person Courses in NYCThis fall, sharpen your skills in jewelry grading, quality control and diamond assessment.
CollectionsNov 21, 2024
Channel Elphaba in Muse’s ‘Have a Heart x Cynthia Erivo’ CollectionCynthia Erivo chose Dreams of Hope, an organization dedicated to empowering LGBTQA+ youth, as the charity for this year’s collection.
MajorsNov 21, 2024
Rocksbox Opens Pop-Up Store in San FranciscoThe new space was designed to evoke a warm, inviting vibe.
IndependentsNov 21, 2024
Mary Moses Kinney Is Now Part of The Edge’s Team Kinney, who spent nearly 30 years at IJO, has been hired to head Abbott Jewelry Systems’ new virtual marketplace.
CrimeNov 20, 2024
Sotheby’s to Pay $6.25M Settlement to NY State for Alleged Tax FraudThe auction house was accused of helping clients avoid paying taxes on millions of dollars’ worth of art purchased from 2010 to 2020.
Events & AwardsNov 20, 2024
Kering Debuts New Jewelry Award With Sustainability FocusThe four finalists will present their pieces at the 2025 JCK Las Vegas show.
CollectionsNov 20, 2024
Pamela Love Channels Surrealist Artists in New CollectionThe “Camera Oscura” collection showcases earring designs celebrating female Surrealist artists Claude Cahun and Leonor Fini.
Policies & IssuesNov 20, 2024
Columbia Gem House Raises $10K for Reforestation EffortsThe money will fund the planting of 10,000 trees in critical areas across Oregon, Arizona, Montana, and other regions.
Events & AwardsNov 20, 2024
The Jewelry Symposium Opens Registration, Scholarship ApplicationsThe event centered on advancing jewelry manufacturing technology will return to Detroit in May 2025.
CrimeNov 19, 2024
Woman Killed in Armed Robbery of Sacramento Jewelry StoreLocal reports identified the woman as the wife of the jewelry store owner.
AuctionsNov 19, 2024
‘A Tsar’s Treasure’ Fetches $2.9M at Sotheby’s Jewelry SaleA collection of pieces owned by Ferdinand I, the first king of modern Bulgaria, and his family, blew away estimates in Geneva last week.
MajorsNov 19, 2024
Trove Opens First US Flagship in NYCThe Australian jewelry box brand’s new West Village store will showcase new jewelers each month through its Designer in Residence program.
CollectionsNov 19, 2024
Snoop Dogg’s New Jewelry Collection Is All About Love“Lovechild” was created in partnership with Carolyn Rafaelian’s Metal Alchemist brand.
EditorsNov 18, 2024
Q&A: Helzberg CEO Brad Hampton on the Jeweler’s RebrandHampton discussed how Helzberg is improving the customer experience and why it was inspired by the company formerly known as Dunkin’ Donuts.
Policies & IssuesNov 18, 2024
Reciprocity Jewels Returns to NYC Jewelry WeekThe group will host several curated events and an exhibition of designer jewelry made with Peruvian gold traceable to the miners’ names.
CollectionsNov 18, 2024
Dolly Parton Shines in Collaboration with Kendra ScottThe collection honors the 50th anniversary of Dolly Parton’s “Love is Like a Butterfly” song, which shares a birth year with Kendra Scott.
Events & AwardsNov 18, 2024
IGI Jewelry Design Competition ReturnsThis year’s theme asks designers to take inspiration from classic fairy tales.
EditorsNov 15, 2024
Why Fine Jewelry Belongs at New York Comic ConSenior Editor Lenore Fedow makes the case for why more jewelers should be appealing to nerds at the annual event.
CollectionsNov 15, 2024
Marie Lichtenberg Battles Counterfeits with New ‘Raiz’in Scapular’ DesignsThe latest “Raiz’in” drop showcases a newly designed “Scapular” necklace and donates a portion of the proceeds to Make-A-Wish France.
WatchesNov 15, 2024
Piece of the Week: Citizen’s Commemorative Pocket WatchNo. 1 out of 100, the timepiece was created to mark Citizen’s 100th anniversary and will be auctioned off at Sotheby’s next month.
