Technology

NDC’s Assure Program Adding Mounted Jewelry Testing

TechnologySep 28, 2021

NDC’s Assure Program Adding Mounted Jewelry Testing

Assure has also enlisted a second lab for testing, at the University of Antwerp in Belgium.

20210928_RJC Assure 2.0.jpg
The Natural Diamond Council’s Assure Program is launching version 2.0 this fall, adding testing for diamonds set into jewelry and enlisting a second lab as a testing site in Antwerp.
New York—The Natural Diamond Council announced Monday the Assure Program will begin testing mounted jewelry this fall and will be doubling its testing capacity by adding a second lab.

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. 

 Related stories will be right here … 

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. 
“Everyone is responsible for correctly disclosing the nature of the product they are selling, but to facilitate this we need robust diamond verification instruments that are rigorously tested,” said Raluca Anghel, NDC’s head of external affairs and industry relations.

“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

Michelle Graffis the editor-in-chief at National Jeweler, directing the publication’s coverage both online and in print.

The Latest

Collage of NationalJeweler.com’s most-read stories of 2025
EditorsDec 31, 2025
The Top 5 Stories of 2025

Articles about crime, engagement rings, and a necklace worn in the World Series generated the most interest among readers.

Becka Johnson Kibby
MajorsDec 30, 2025
Becka Johnson Kibby to Lead Edge Retail Academy

As part of the leadership transition, Sherry Smith will take on the role of vice president of coaching strategy and development.

Stock image of rough diamonds from Diavik mine in Canada
SourcingDec 30, 2025
India Chosen as KP Chair for 2026

It marks the third time the country has headed the Kimberley Process. Ghana will serve as vice chair.

Recipients Collage 2025 - NJ (1872 x 1050 px) (1872 x 1052 px).png
Brought to you by
Impacting Tomorrow Today

How Jewelers of America’s 20 Under 40 are leading to ensure a brighter future for the jewelry industry.

Bulova x Stetson collection
WatchesDec 30, 2025
Bulova, Stetson Collab on Watches With Western Flair

The new Bulova x Stetson designs highlight two animals often associated with the American West—the bison and the Texas Longhorn.

Weekly QuizDec 23, 2025
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Rahaminov Diamonds Pop-Up at Yamron Jeweler
CollectionsDec 30, 2025
Rahaminov Diamonds Pops Up in Florida

Its residency at Yamron Jewelers will run through May 2026.

In Memoriam collage 2025
IndependentsDec 29, 2025
In Memoriam: Industry Friends We Lost in 2025

From influential executives to innovative designers, we pay tribute to the people we said goodbye to this year.

roseco-catalog.png
Brought to you by
Roseco Releases New Full-Line Catalog

Roseco’s 704-page catalog showcases new lab-grown diamonds, findings, tools & more—available in print or interactive digital editions.

Tanishq Orlando store exterior
MajorsDec 29, 2025
Tanishq Opens New Stores in Florida, Virginia

The retailer is expanding into areas with large Indian and South Asian populations.

Nanis Madonna di Campiglio Flagship
MajorsDec 29, 2025
Nanis Opens First Flagship Store

The Italian brand has opened its first flagship amid the peaks of the Dolomites in Madonna di Campiglio, Italy.

Amethyst Geodes Unearthed: Raw Beauty
SourcingDec 29, 2025
‘Unearthed: Raw Beauty’ Exhibition Opens at LA Museum

The new curation at the Natural History Museum of Los Angeles County showcases rare gem and mineral specimens in their uncut, natural state.

Stock image of gavel
CrimeDec 24, 2025
LA Jewelry District Couple Pleads Guilty to Hiding Millions from IRS

The couple pleaded guilty to concealing at least $127 million in cash transactions at its precious metals businesses.

People shopping in winter clothes
SurveysDec 24, 2025
Consumer Confidence Falls Again in December

Consumers shared concerns about prices, inflation, tariffs, trade, and politics in the survey’s write-in response section.

Bonhams US headquarters
AuctionsDec 24, 2025
Bonhams to Open New U.S. Flagship in NYC

In February 2026, the auction house will move its headquarters to the former Steinway Hall, a neoclassical landmark on Billionaires’ Row.

Hana Kaneko rings
Events & AwardsDec 24, 2025
NYC Jewelry, Antique, & Object Show Announces Winter Event

The new show will take place Jan. 23-25, 2026.

Brian Patrick Gilbertson
SourcingDec 23, 2025
Mining Titan Brian Gilbertson Dies at 82

The former BHP Billiton leader and Gemfields chairman is remembered for his influential leadership throughout his 50-year mining career.

Costume Designers Guild Award By Bulgari
Events & AwardsDec 23, 2025
Bulgari Reimagines Costume Designers Guild Award

The LVMH-owned brand has partnered with the costume design union to revamp its award for 2026.

Kering logo
MajorsDec 23, 2025
Kering to Acquire Stake in Raselli Franco Group

The luxury titan inked a deal to acquire an initial minority stake in the jewelry manufacturer with a pathway to full ownership by 2032.

For Future Reference Vintage
MajorsDec 23, 2025
For Future Reference Vintage Enters Bloomingdale’s

The company’s curation of unsigned vintage and estate jewelry debuted at the Bloomingdale’s in Costa Mesa, California.

Counterfeit Cartier and Audemars Piguet watches
CrimeDec 22, 2025
Customs Seizes Hundreds of Fake Rolex, Cartier Watches

In the recent multi-shipment seizure, CBP also found counterfeit Audemars Piguet, Moncler, and Chrome Hearts items.

Helzberg new store concept rendering
EditorsDec 22, 2025
How Helzberg Is Reimagining Its Stores

Helzberg’s Chief Retail Officer Mitch Maggart shared details about its tests of a new store concept rooted in an elevated luxury experience.

Graphic for the 2025 Year-End Webinar
Recorded WebinarsDec 22, 2025
2025 Jewelry Rewind: Looking Back on an Eventful Year

Jewelers of America execs and National Jeweler editors discuss tariffs, the sky-high gold price, and the engagement that broke the internet.

Pair of Ippolita Lollatini earrings
MajorsDec 19, 2025
MadaLuxe Group Acquires Ippolita

The luxury goods company said founder Ippolita Rostagno will remain at the brand’s helm.

Bulgari CEO Laura Burdese
MajorsDec 19, 2025
LVMH Names New Bulgari CEO

Laura Burdese, who joined the Italian luxury brand in 2022, will take on the role in July.

Harwell Godfrey Lil Buddies
EditorsDec 19, 2025
2025 Jewelry Superlatives: A Yearbook-Style Year in Review

The National Jeweler editors revisit the most noteworthy industry happenings and design trends from 2025.

Front of Jean Schlumberger’s ‘African Cat’ brooch
AuctionsDec 19, 2025
Jean Schlumberger’s ‘African Cat’ Is Purr-Fection

Need a gift for the cat lover who has everything? Look no further than our latest Piece of the Week.

Audemars Piguet Grosse Pièce
AuctionsDec 18, 2025
Audemars Piguet Reclaims Historic Pocket Watch at Auction

It purchased the “Grosse Pièce,” an ultra-complicated Audemars Piguet pocket watch from the ‘20s, for a record-breaking price at Sotheby’s.

×

This site uses cookies to give you the best online experience. By continuing to use & browse this site, we assume you agree to our Privacy Policy