EditorsNov 07, 2025
Piece of the Week: An MVP’s Sapphire Tennis Necklace At the 2025 World Series, the Los Angeles Dodgers’ Yoshinobu Yamamoto sported a custom necklace made by California retailer Happy Jewelers.
GradingAug 23, 2018
GIA Finds Imitation Emerald Made of Layered Glass
The 3.35-carat stone had a natural beryl core; glass layers were attached to it with a “colorless cement.”
A face-up view of the imitation emerald under cross-polarized light showing the inert reaction of the outer material and interference planes that outline the beryl core (Photomicrograph by Tyler Smith, GIA)
New York—Another gem has surfaced at a lab that was not entirely what it seemed.
A 3.35-carat “emerald” submitted to the Gemological Institute of America’s New York lab turned out to be an assembled imitation gemstone composed of five layers of glass cemented to a beryl core, according to an article by Tyler Smith and Augusto Castillo in the Summer 2018 issue of Gems & Gemology.
The rectangular core was a natural beryl, the mineral species to which emerald belongs, but the crown was a single piece of glass attached to the pavilion, while the pavilion was composed of four asymmetrical glass segments glued to the core using a “colorless cement.”
The imitation stone probably took a while to create using a “laborious multistep cut-and-glue process,” GIA authors said, as indicated by the way the four glass segments in the pavilion are interlocked. 
The manufacturing of the piece started by attaching a glass segment to the beryl core. Both were then cut to create a flat surface for a second piece of glass. The second was then added, cut to allow for the third, and so forth.
After all four had been added, the assembled pavilion likely would have been polished flat to allow for the crown, which then would have been attached.
(Check out the original lab note from GIA for a diagram showing the process.)
The article also noted that while assemblages of various materials have long been used to imitate precious stones—with the most common kind using two or more pieces joined together in parallel, layered fashions—GIA researchers weren’t able to find record of another stone assembled using the process applied to this “emerald.”
RELATED CONTENT: Glued-Together Diamond Turns Up at GIAGIA said it was the first time one such assembled stone has been submitted to its New York or Carlsbad laboratories.
Researchers surmise that the imitation emerald was created relatively recently, given the fact that all its exposed surfaces are made of glass and, yet, the facet junctions are still sharp and the stone lacks wear.
“It is intriguing that an antiquated technique is updated in modern times, serving as a cautionary tale of the ingenuity counterfeiters employ,” the authors said.
More on Grading
The Latest
IndependentsNov 07, 2025
Foundrae’s New Palm Beach Location Is a ‘Golden Solarium’The brand’s seventh location combines Foundrae’s symbolic vocabulary with motifs from Florida’s natural surroundings.
FinancialsNov 07, 2025
Watches of Switzerland’s H1 Sales Up 8%The retailer also shared an update on the impact of tariffs on watch customers.
Brought to you by
Jewelers of America Aligns New Mission to Create Meaningful Impact for MembersFrom educational programs, advocacy, and recent MJSA affiliation, Jewelers of America drives progress that elevates businesses of all sizes.
SourcingNov 06, 2025
Pink Tourmaline Bracelet, Emerald Suite Take Top Spectrum Honors Pink and purple stones were popular in the AGTA’s design competition this year, as were cameos and ocean themes.
Weekly QuizNov 06, 2025
This Week’s QuizTest your jewelry news knowledge by answering these questions.
IndependentsNov 06, 2025
Greenwich St. Jewelers Hosts Raffle Supporting Food RescueAll proceeds from the G. St x Jewel Boxing raffle will go to City Harvest, which works to end hunger in New York City.
IndependentsNov 06, 2025
Cornell’s Jewelers Names New PresidentCourtney Cornell is part of the third generation to lead the Rochester, New York-based jeweler.
SourcingNov 06, 2025
De Beers’ Production, Sales Increase in Q3 De Beers also announced more changes in its upper ranks ahead of parent company Anglo American’s pending sale of the company.
WatchesNov 05, 2025
Shinola President Steps Down Just as He Starts Former Signet CEO Mark Light will remain president of Shinola until a replacement for Ulrich Wohn is found.
AuctionsNov 05, 2025
Taylor Swift’s Engagement Ring Designer Makes Her Auction DebutKindred Lubeck of Artifex has three rings she designed with Anup Jogani in Sotheby’s upcoming Gem Drop sale.
FinancialsNov 05, 2025
Pandora Posts Modest Q3 Sales Growth Amid ‘Weak’ Consumer Sentiment The company focused on marketing in the third quarter and introduced two new charm collections, “Pandora Talisman” and “Pandora Minis.”
FinancialsNov 05, 2025
Brilliant Earth’s Q3 Sales Climb 10%The jewelry retailer raised its full-year guidance, with CFO Jeff Kuo describing the company as “very well positioned” for the holidays.
Policies & IssuesNov 04, 2025
Supreme Court to Hear Tariffs Case WednesdayAhead of the hearing, two industry organizations co-signed an amicus brief urging the court to declare Trump’s tariffs unlawful.
MajorsNov 04, 2025
Danny Clark to Become Stuller CEO, Succeeding Matt StullerStuller COO Belit Myers will take on the additional role of president, with all changes effective at the start of 2026.
ColumnistsNov 04, 2025
Peter Smith: What Do Birds Have to Do With the Price of Gold? Smith cautions retailers against expending too much energy on things they can’t control, like the rising price of gold.
TrendsNov 04, 2025
Amanda’s Style File: Fall Colors for November BirthdaysCitrine and topaz are birthstones fit for fall as the leaves change color and the holiday season approaches.
IndependentsNov 04, 2025
Weston Jewelers Heads to Fort LauderdaleThe family-owned jeweler will open its fourth store in Florida in late 2027.
CrimeNov 03, 2025
Men Dressed as Construction Workers Burglarize Jeweler’s Home The NYPD is looking for three men who stole a safe and jewelry valued at $3.2 million from the home of a jeweler in Jamaica Hills, Queens.
MajorsNov 03, 2025
Matthew Rosenheim Takes Over as JA Board ChairThe trade organization also announced its executive committee and five new directors.
CollectionsNov 03, 2025
Muse’s ‘Have a Heart’ Collab Returns, Now With DDGThe “Have a Heart x Diamonds Do Good” collection is championed by model and humanitarian Flaviana Matata and will benefit her foundation.
AuctionsNov 03, 2025
Kashmir Sapphire Ring Tops Christie's Online AuctionThe ring, set with a nearly 17-carat Kashmir cabochon sapphire, sold for $1 million.
TrendsOct 31, 2025
Piece of the Week: A Spinner Fit for ‘Frankenstein’This “Mother Father” spinner necklace from Heavenly Vices Fine Jewelry draws inspiration from Victorian Era jewelry.
CrimeOct 31, 2025
5 More Arrested in Louvre Heist, Jewelry Still Missing The suspects were rounded up in Paris and its suburbs on Wednesday night, but none of the stolen jewels were recovered with them.
Recorded WebinarsOct 31, 2025
Watch: How to Master Google Reviews for Your BusinessExperts share top tips on how to encourage positive reviews and handle negative feedback.
Supplier BulletinOct 30, 2025
Protect Your Customers and Your BusinessSponsored by the Gemological Institute of America
CrimeOct 30, 2025
29-Year-Old Man Charged in Multiple Seattle-Area Smash and Grabs The suspect faces charges in the August robbery of Menashe & Sons Jewelers and is accused of committing smash and grabs at two pawn shops.
