CollectionsAug 14, 2025
In Midst of ‘Sardine Girl Summer,’ Pippa Small Looks to ‘Flounder Fall’Her new “Ocean” collection was inspired by Myanmar’s traditional articulated fish jewelry, with depictions of flounder, catfish, and more.
GradingFeb 24, 2016
5-Carat Lab-Grown Blue Diamond Graded by GIA
It’s the largest faceted lab-grown blue the Gemological Institute of America’s ever studied, and it received a color grade of fancy deep.
The GIA examined this 5.03-carat fancy deep blue high-pressure, high-temperature (HPHT) lab-grown diamond. (Photo credit: Sood (Oil) Judy Chia)
New York--The Gemological Institute of America’s New York laboratory recently evaluated the largest lab-grown blue diamond it’s seen to date, a 5.03-carat stone made by a diamond company based in St. Petersburg, Russia.
According to a Lab Note authored by GIA researchers Kyaw Soe Moe, Paul Johnson, Ulrika D’Haenens-Johansson and Wuyi Wang, the emerald-cut diamond was produced by NDT.
NDT, or New Diamond Technology, is one of the founding members of the new International Grown Diamond Association. It’s also the company that produced the world’s largest known colorless diamond, a 10.02-carat, F color, VS1 stone cut from a 32.26-carat piece of rough and submitted to IGI Hong Kong last year.
The Lab Note stated that the 5.03-carat diamond exhibited a number of traits characteristic of diamonds grown using the high-pressure, high-temperature (HPHT) process, including color zoning and a cuboctahedral growth pattern.
The GIA researchers graded the stone a VS1, fancy deep blue. They noted that this is a very attractive hue that contains no other color component, a rarity among natural type IIb diamonds.
The evaluation of a lab-grown blue diamond of this size was so significant that the GIA researchers opted to have the Lab Note published online in advance of the next edition of Gems & Gemology, the GIA’s quarterly journal.
To read the complete article on the 5.03-carat fancy deep blue lab-grown diamond, go to GIA.edu.
More on Grading
The Latest
MajorsAug 14, 2025
Casio America Names New CEOLongtime Casio executive Yusuke Suzuki is the new president and CEO of Casio’s U.S. subsidiary.
SourcingAug 14, 2025
West Coast Orgs to Host Trading Event, Mixer in LAThe full-day sourcing and networking event, slated for Aug. 18, will be followed by the fifth annual Mega Mixer Summer Soirée.
Brought to you by
Taking the Moment Head On: How Rio Grande Champions the Present & Future of Fine JewelryAs a leading global jewelry supplier, Rio Grande is rapidly expanding and developing new solutions to meet the needs of jewelers worldwide.
TrendsAug 13, 2025
Cristiano Ronaldo Proposes With Gigantic Oval-Cut DiamondModel Georgina Rodríguez received a rock of an engagement ring, with her diamond estimated to be 35 carats, experts say.
Weekly QuizAug 08, 2025
This Week’s QuizTest your jewelry news knowledge by answering these questions.
SourcingAug 13, 2025
ICA Names 2025 Board of DirectorsThe board elected 9 new directors at its recent ICA Congress in Brazil.
TrendsAug 13, 2025
Colorado Jeweler, Whiskey Maker Collab on Ring GiveawayThree winners will receive a custom ring from Honest Hands Ring Co. inlaid with a piece of history from Denver-based distillery Stranahan’s.
Brought to you by
Investing in the Next Generation of Bench JewelersThe Seymour & Evelyn Holtzman Bench Scholarship from Jewelers of America returns for a second year.
SurveysAug 13, 2025
These Are The 25 Hottest Retailers, Says NRFJD Sports and Wawa were among the fastest-growing retail companies in the U.S. last year.
SourcingAug 13, 2025
Columbia Gem House Launches Winza Sapphires, RubiesThe new inventory, all untreated, features vibrant hues and unique bicolor combinations.
SourcingAug 12, 2025
Gemfields Sells Fabergé for $50MAcquired by a tech investor, the historic brand will continue to focus on jewelry, accessories, and timepieces.
Policies & IssuesAug 12, 2025
Higher Tariff on Chinese Imports Paused for 90 Days, Trump SaysPresident Donald Trump issued an executive order extending the pause on higher tariffs to November as negotiations with China continue.
CollectionsAug 12, 2025
Jacquie Aiche’s New Collection Harnesses the Energy of the ThunderbirdThe “Thunderbird Slab” collection features a thunderbird motif as a symbol of power, protection, and boundless possibility.
ColumnistsAug 12, 2025
Creative Connecting: How to Take a Better HeadshotColumnists Jen Cullen Williams and Duvall O’Steen share tips on how to elevate your professional image.
CrimeAug 11, 2025
Man Convicted of First-Degree Murder in Death of Colorado JewelerPeter Damian Arguello, a jeweler in the Denver suburb of Wheat Ridge, was found dead inside his store in November 2023.
IndependentsAug 11, 2025
Lisa Bridge to Depart Ben Bridge JewelerThe retailer, owned by Berkshire Hathaway, is becoming part of the Berkshire Hathaway Jewelry Group with Helzberg.
Events & AwardsAug 11, 2025
Bethenny Frankel to Give Keynote at CBG’s Experience ShowThe Continental Buying Group’s 2025 Tampa Experience Show is slated for Sept. 8-10.
EditorsAug 11, 2025
The Colors Expected to Be On-Trend in a Couple YearsAssociate Editor Lauren McLemore recently attended a fabrics trade show where a trend forecaster shared her predictions for summer 2027.
FinancialsAug 08, 2025
Brilliant Earth’s Q2 Sales Up 3% as Engagement Ring Sales RiseThe company raised its full-year sales guidance while noting it has not yet assessed the potential impact of the latest tariff news.
Events & AwardsAug 08, 2025
GJEPC’s Jewellers for Hope Celebrates 10 Years of FundraisingThe organization has raised more than $1.3 million for charity since its inception.
TrendsAug 08, 2025
Piece of the Week: Rahaminov Diamonds’ Bezel BangleThe brand’s latest iteration of a bezel-set diamond bangle features clean lines and a timeless design for a new modern silhouette.
WatchesAug 07, 2025
Bulova’s New Collection Honors Tony BennettThe first watch in the series commemorates his participation in the Civil Rights movement, marching from Selma to Montgomery in 1965.
Lab-GrownAug 07, 2025
Chatham Releases Catalog for Loose Lab-Grown GemstonesThe catalog contains a complete listing of all the loose gemstones in stock, as well as information about the properties of each stone.
TechnologyAug 07, 2025
Rembrandt Charms Debuts New Website, Bird CharmsThe company added a retailer dashboard to its site and three new birds to its charm collection, the cardinal, blue jay, and hummingbird.
Policies & IssuesAug 06, 2025
Tariff on India to Rise to 50%, Trump Says An additional 25 percent tariff has been added to the previously announced 25 percent.
MajorsAug 06, 2025
Claire’s Files for Chapter 11 Bankruptcy AgainThe jewelry and accessories retailer plans to close 18 stores as part of the proceedings.
IndependentsAug 06, 2025
Smith & Son Jewelers to Close 107-Year-Old Location Its Springfield, Massachusetts, store is set to close as owner Andrew Smith heads into retirement.
