CrimeMay 13, 2026
JSA’s 2025 Crime Report Shows ‘Concerning’ Rise in ViolenceWhile the overall number of crimes was down, there were more incidences in which robbers pulled out guns, mace, or rammed cars into stores.
SourcingApr 01, 2016
GIA: More Large Lab-Grown Diamonds Likely Are Coming
The lab’s Tom Moses and Wuyi Wang reached this conclusion after being granted permission to visit a diamond-growing factory in China.
A factory in China is producing a large number of colorless, gem-quality diamonds grown using the high-pressure, high-temperature (HPHT) process. The GIA said these crystals have typical cuboctahedral morphology and weigh up to 3.5 carats. (Photo used with permission of the GIA, credit Jianxin (Jae) Liao.)
Carlsbad, Calif.--The Gemological Institute of America said it expects even more large lab-grown diamonds produced using the high-pressure, high-temperature (HPHT) method to enter the supply pipeline in the future.
In an article slated to appear in the spring 2016 issue of Gems & Gemology and published on GIA.edu now, the GIA’s Tom Moses and Wuyi Wang described their experience at Jinan Zhongwu New Materials Co. Ltd., a diamond-growing factory in Shandong, China. The GIA asked and, subsequently, was granted permission to visit this factory.
There, Moses, the GIA’s chief laboratory and research officer, and Wang, the director of research and development, obtained 50 crystals ranging in size from 0.5 to 1.2 carats. All were readily identifiable as synthetic using the same instrumentation and techniques applied to diamonds submitted to the GIA for grading, the lab said.
The article also noted that the HPHT technology used to grow gem-quality diamonds has improved rapidly in the last few years, and that it’s now being used to produce “many” melee-size diamond as well as large colorless single crystals.
Moses and Wang said in the article that one Russian company, New Diamond Technology, is reportedly able to grow multiple large gem-quality colorless diamond crystals in a single run, and that Jinan Zhongwu New Materials is utilizing similar technology.
New Diamond Technology is the Russian company that produced a 10.02-carat, F color diamond and a 5.03-carat fancy deep blue. An article about the blue diamond also will be in the upcoming edition of Gems & Gemology and was published online beforehand.
While the Jinan’s total production volume remains unclear, “it is undoubtedly significant, and capacity is likely to expand in the near future,” the article states. “This strongly suggests that even more large HPHT synthetic diamonds will be introduced into the jewelry industry.”
A GIA spokeswoman said any further details the GIA is able to share about Jinan Zhongwu New Materials will be included in the spring edition of Gems & Gemology.
Editors' Picks
Sponsored by
More on Sourcing
The Latest
IndependentsMay 13, 2026
New Orleans Jeweler Closing Canal Place StoreJack Sutton Fine Jewelry is closing its store inside the downtown shopping center after 40 years in business.
TrendsMay 13, 2026
State of Design: Only the Innovative Will SurviveThe price of gold has risen, affecting the number of pieces designers make, the materials they use, and how they position themselves.
Brought to you by
How Modern Training Is Becoming a Competitive Advantage for Jewelry RetailersWith the trade and customer trust in mind, GIA® developed NextGem™ – on-demand training designed specifically for retail.
ColumnistsMay 12, 2026
It’s Official: We’re Getting ‘Brain Rot’ From Watching Short-Form Videos Peter Smith gives tips on leading meetings, developing marketing, and making trade show appointments in the age of short attention spans.
Weekly QuizMay 07, 2026
This Week’s QuizTest your jewelry news knowledge by answering these questions.
CollectionsMay 12, 2026
Jessica McCormack Debuts Antique Coin-Inspired Medallions for SummerThe 11-piece “Medallions” capsule collection features five motifs: a crying eye, a heart on fire, a spiral, a flower, and a swallow.
IndependentsMay 12, 2026
State of Retail: 6 Things Retailers Should Know About Consumers TodayFrom Gen Z’s view of luxury to “doom spending,” these are the six consumer trends to note this year.
Brought to you by
Discover Timeless Treasures: A Showcase of Antique Jewelry & Timepieces in Las VegasGain access to the most exclusive and coveted antique pieces from trusted dealers during Las Vegas Jewelry Week.
Events & AwardsMay 12, 2026
The Tiffany & Co. x CFDA Jewelry Designer Award Is BackThe partners have announced the second cycle of the program, which has expanded to include a $25,000 student scholarship.
IndependentsMay 11, 2026
Kansas Jeweler Closing After 70 YearsThe owners of Staats Jewelers are heading into retirement.
TrendsMay 11, 2026
Former Macy’s CEO Joins Signet Jewelers BoardJeffrey Gennette, who retired in 2024 after 41 years with Macy’s, is the newest member of the jewelry retailer’s board of directors.
TrendsMay 11, 2026
Amanda’s Style File: Lucky May May babies are lucky to have emeralds, a gemstone admired for centuries, as their birthstone, writes Amanda Gizzi.
TechnologyMay 11, 2026
Clientbook’s New Tool Helps Jewelers Plan In-Store EventsThe new module allows retailers to plan, promote, and measure the success of events from a single dashboard.
Lab-GrownMay 08, 2026
NDC Publicly Criticizes Pandora Over ‘Misleading’ Natural Diamond ClaimsNDC said in an open letter that Pandora’s statements about the carbon footprint of lab grown versus natural diamonds are inaccurate.
TrendsMay 08, 2026
Rihanna Chooses ‘Desert Diamonds’ for 2026 Met GalaShe wore our Piece of the Week, Glenn Spiro’s “Old Moghul Golconda” earrings, featuring fancy brown-yellow diamonds totaling 51.90 carats.
Events & AwardsMay 08, 2026
JA Announces 2026 CASE Award WinnersTwo pieces were named “Best in Show,” one from the retail category and one from the supplier category.
FinancialsMay 07, 2026
Brilliant Earth Appeals to Higher-Income Shoppers in Q1The jewelry retailer noted resilience among its higher-end customers while demand softened for its lower-priced offerings.
AuctionsMay 07, 2026
‘Spectacular’ Kashmir Sapphire Headlines Heritage Spring Jewelry SaleLed by the 6.59-carat sapphire, the sale garnered $9.7 million, a record total for a Heritage jewelry auction.
MajorsMay 07, 2026
Gannon & Scott Names New Regional Account ExecutiveIn his new role, sales specialist Billy Welshoff will focus on the eastern United States.
WatchesMay 07, 2026
Chrono24 Names New CEOJosé Gaztelu has been promoted to the role, which has been vacant since last year.
Events & AwardsMay 07, 2026
JA Accepting Applications for 2026 Scholarship ProgramIt has also opened the application period for the Seymour & Evelyn Holtzman Bench Scholarship through June 30.
SourcingMay 06, 2026
Canada’s Oldest Diamond Mine Faces Uncertain FutureThe owner of the Ekati mine, which opened in 1998, has filed for insolvency protection amid the significant decline in diamond prices.
FinancialsMay 06, 2026
Pandora to Add Carbon Footprint Info to Lab-Grown DiamondsThe company announced the change alongside its Q1 results, which showed that the jewelry brand’s year is off to a shaky start.
MajorsMay 06, 2026
Saks Global Begins Layoffs, Reorganization Plans Closer to ApprovalThe retailer will cut 16 percent of its corporate workforce as part of its plan to exit bankruptcy.
AuctionsMay 06, 2026
Steve McQueen’s Heuer Monaco Watch Heads to Sotheby'sOf the many examples used in the filming of “Le Mans,” this one is believed to have spent the most time on Steve McQueen’s wrist.
EditorsMay 05, 2026
This Ohio Designer’s Jewelry Made It to the Met GalaMegan Piccione dressed Lauren Wasser in layers of diamond jewelry, making her stand out in a crowd that included celebrities like Beyoncé.
SourcingMay 05, 2026
Doug Hucker Returns to His RootsFollowing decades of association leadership, the “semi-retired” colored gemstone expert is turning his focus to gemstone education.
