Kaiser, whose illustrious career spanned decades, died suddenly on Friday.
GIA Examines 5- and 10-Carat Lab-Grown Diamonds
The laboratory said the 5.19-carat diamond represents a “significant milestone” in CVD diamond growing.

Carlsbad, Calif.--The Gemological Institute of America recently examined two large lab-grown diamonds submitted to its Hong Kong lab, one of which represents a “significant milestone” in diamond growing.
In a research article authored by Billie “Pui Lai” Law and Wuyi Wang, the GIA said it recently examined a 5.19-carat diamond grown using the chemical vapor deposition process.
The stone, which is J-equivalent color and VS2-equivalent clarity, is the largest CVD-grown diamond examined by the lab to date, and the largest ever reported in the jewelry industry.
Breaking the 5-carat barrier is a “significant milestone” for CVD technology, which has been producing bigger diamonds in recent years, a trend that’s expected to continue.
As the GIA noted, “As diamond growth techniques continue to advance, we expect to see more high-quality samples, both in size and clarity.”
The article also stated that the 5.19-carat diamond was submitted to the lab without proper disclosure.
However, the GIA was able to identify it as a CVD synthetic using its standard screening and testing processes, though the lab noted that black inclusions, which often are contained in synthetic diamonds, were not found in this CVD diamond, meaning it could have been mistaken as a mined diamond if only microscopic examination was used.
The identification of this lab-grown diamond “highlights the importance of using advanced spectroscopic instruments as well as conventional gemological techniques to ensure an accurate identification,” the GIA said.
The second article, authored by Wang and Terry “Ping Yu” Poon, discussed the examination of a 10.08-carat blue diamond grown by St. Petersburg, Russia-based New Diamond Technology. NDT is the same company that grew the 5.03-carat blue diamond examined by the GIA’s New York laboratory earlier this year.
Grown using the high-pressure, high-temperature method and disclosed as a synthetic diamond by NDT, the stone is the largest HPHT-grown diamond recorded to date.
The GIA said the emerald-cut stone has a color grade equivalent to fancy deep blue.
The Latest

The family-owned jeweler is relocating its Braintree, Massachusetts, store to a new space.

He will step into the retailer’s newly created role of chief development officer.

When it comes to knowing the identity and quality of your pearls, count on GIA as your independent pearl experts.

Three industry experts discuss “recycled” gold vs. mined, their challenges and benefits, and how jewelers can navigate the area.


Cartier, Van Cleef & Arpels, and Buccellati put on stellar performances.

The New York jeweler made this incredible, colorful Art Deco bracelet featuring tropical birds in 1927.

Advanced technology levels the playing field, helping jewelers give customers what they want.

From a slowdown in sales growth to rising costs, Fruchtman Marketing outlines its expectations for the second half of the year.

Once a part of Julius Klein Group, the diamond company combines its direct supply and cutting expertise with a keen eye to the future.

One analyst cited rising diamond prices and the sanctions on Alrosa as contributing factors.

The two have partnered on a capsule collection.
John A. Green of retailer Lux Bond & Green and Niveet Nagpal of Omi Privé have joined the board of directors as of May 18.

The retailer also said demand for Rolex, Patek Philippe, and Audemars Piguet watches continues to exceed its supply.

The auction house’s upcoming sale also includes collections from American heiresses.

The Connecticut jeweler reflected on five decades in the industry and what the future holds for the family business.

The chapter has organized a day trip to the Sterling Hill Mine and Museum in Ogdensburg on Saturday, May 21.

The stones come from a deposit close to Mahenge and have been on the market for several months.

The jewelry designer is partnering with popcorn brand Angie’s Boomchickapop on a whimsical diamond cut.

In the latest article from The Smart Lab, Emmanuel Raheb outlines the website changes jewelers can expect with this new software.

The new app allows salespeople to quickly and easily access a lot of inventory.

Following its Paris debut, “Cartier and Islamic Art: In Search of Modernity” has landed at the Dallas Museum of Art.

The fine jewelry brand expects to open 17 new locations, mostly in North America.

The Kansas retailer is aiming for a fall 2023 opening.

It will be located in Vietnam’s Binh Duong Province, and construction is slated to start early next year.

It’s full of hundreds of contacts for jewelry-making supplies and services.

The company is feeling the impact of the uncertain geopolitical and macroeconomic environment, said CEO Beth Gerstein.