NDC’s Assure Program Adding Mounted Jewelry Testing
Assure has also enlisted a second lab for testing, at the University of Antwerp in Belgium.

Launched in 2019, Assure uses third-party entities to test and provide feedback on the instruments designed to separate natural diamonds from lab-grown stones and simulants.
The program launched in 2019, testing loose stones on instruments from manufacturers including De Beers Group, the Gemological Institute of America, Presidium, DRC Techno, and more.
Assure 2.0 will expand to gauge the machines’ capability to test diamonds set into jewelry, with both open- and closed-back mounted stones included in the testing regimen, NDC said.
In addition, Assure has enlisted a second lab for the program, located at the University of Antwerp in Belgium.
This facility will operate alongside the original Assure testing location, UL in Canton, Massachusetts, using the same samples and procedures.
NDC said the addition of the Antwerp lab will double its testing capacity.
It also will add geographic diversity, giving instrument manufacturers a European point of contact rather than having to send all their machines to the United States.
Manufacturers are invited to submit new instruments as well as existing instruments due for testing again (the Assure Tested Certification expires after two years) to the Assure program starting in October.
“With this latest iteration of the Assure program, manufacturers will be presented with vital information to continue improving their devices, and consumers can be assured of the vigorous steps taken to ensure their confidence.”
A complete guide to Assure-tested devices is available on the NDC website.
Manufacturers interested in exploring individual projects with Assure, like supporting internal research, calibrating instruments, and testing new devices, can email the program at assure@naturaldiamonds.com.
The Latest

The new facility was also designed to better serve its growing customer base in Canada.

The campaign is a tribute to the year 1893, when Kokichi Mikimoto created the world’s first cultured pearl.

It is the only GIA school to offer the GIA Graduate Gemologist program in Chinese.

You deserve to know what you are selling–to protect your customers as well as your business and your reputation.

The initiative connects veterans and parents returning to the workforce with careers in jewelry retail.


The wholesale manufacturer and precious metals refiner has appointed Michael Angelo as its new national sales representative.

Foundrae also accused the jewelry giant of copying its mood board style of marketing.

Every jeweler faces the same challenge: helping customers protect what they love. Here’s the solution designed for today’s jewelry business.

A Patek Philippe for Tiffany & Co. timepiece owned by the American businessman who died on the Titanic will be offered at Freeman's Chicago.

The Conference Board’s Consumer Confidence Index edged up, with optimism about the present outweighing worries about the future.

The retailer’s Zach Bear gift comes to life in “Zach Bear and the Window Necklace,” which centers on curiosity, bravery, and helping.

Applications are open for the AGA Gemological Scholarship Program through May 15, and until June 2027 for the Gemological Research Grant.

These customer behavior patterns say a lot about how successful your jewelry store is going to be this year, Emmanuel Raheb writes.

Mejuri’s popular collection of 18-karat yellow gold vermeil rings debuted in sterling silver alongside new “Puzzle” slider charms.

The Miami-based jewelry brand and the NYC-based artist will be in Dallas from April 9-11.

The initiative invites those in the industry to share stories on social media highlighting the meaning and impact of natural diamonds.

Wolk’s first day on the job as CEO of Tracr, De Beers Group’s blockchain platform, will be May 1.

Moses, who will leave the lab in May after nearly 50 years, discusses his start in the business, gemstones that stand out, and what’s next.

The new catalog, which showcases 35 one-of-a-kind pieces of jewelry, is a compliment to the company’s popular holiday catalog.

Production has ceased at the Canadian diamond mine, which has yielded more than 150 million carats of rough diamonds in its 23-year run.

The store opening marks the 10th United States location for the India-based jewelry retailer.

Two Saks Fifth Avenue locations, one in Florida and one in California, and one Neiman Marcus store are off the chopping block.

West, who started in the art department at the Leading Jewelers Guild in 1979, is remembered for his patience, kindness, and dedication.

In the “Tesoro” version of the ring, our Piece of the Week, each side of the gold hexagonal nugget has a unique colored gemstone design.

Cohen discusses the evolution of Citizen’s light-powered technology, the brand’s cross-generational appeal, and tariffs.

“Essentially Human: On Sales and Salespeople" reveals the underlying human traits and behaviors of the most successful sales professionals.

The collection features symbols of love, luck, and light, based on the story of Queen Cassandane and Cyrus the Great of Persia.
























