It is located in Marin County, California.
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.
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.
The Latest
Concerns about rising prices, politics, and global conflicts continue to dampen consumer outlook.
May’s birthstone is beloved for its rich green hue and its versatility.
Meet Ben Claus—grand prize winner of For the Love of Jewelers 2023 Fall Design Challenge.
Jacqui Larsson joins Opsydia with nearly two decades of experience in the industry.
Last month in Dallas, David Walton pushed another jeweler, David Ettinger, who later died.
The “Tiffany Céleste” collection reimagines designer Jean Schlumberger’s interpretations of the universe.
With Ho Brothers, you can unlock your brand's true potential and offer customers the personalized jewelry experiences they desire.
The brand also created a 100-carat lab-grown diamond necklace in honor of its centennial.
Tim Schlick has been promoted from his previous position as COO.
It’s the second year for the event, slated to take place in October in Toronto.
Supplier Spotlight Sponsored by GIA
Sales will be paused while the relocation takes place over the next few months.
“SIS x MISA Denim and Diamonds” is a collaboration between the designer and celebrity stylist Misa Hylton.
The retailer is moving to a newly designed space in the same shopping center.
Gifts that are unique and thoughtful are top of mind this year, according to the annual survey.
The necklace is featured in the brand’s “Rebel Heart” campaign starring Adam Levine and Behati Prinsloo.
The two organizations will host a joint event, “Converge,” in September 2025.
Big changes appear to be on the horizon for the diamond miner and its parent company, Anglo American.
Padis succeeds Lisa Bridge, marking the first time the organization has had two women board presidents in a row.
Jesse Cole, founder of Fans First Entertainment, shared the “five Es” of building a fan base during his AGS Conclave keynote.
The Royal Oak Perpetual Calendar "John Mayer" was celebrated at a star-studded party in LA last week.
The announcement came as the company reported a 23 percent drop in production in Q1.
The three-time Pro Bowler continues to partner with the retailer, donating to a Detroit nonprofit and giving watches to fans.
A double-digit drop in the number of in-store crimes was offset by a jump in off-premises attacks, JSA’s 2023 crime report shows.
Inspired by the Roman goddess of love, the designer looked to the sea for her new collection.
The luxury titan posted declining sales, weighed down by Gucci’s poor performance.