Editors

5 Takeaways on the Lab-Grown Diamond Market

EditorsNov 15, 2016

5 Takeaways on the Lab-Grown Diamond Market

Editor-in-Chief Michelle Graff shares what she learned at the recent forum on lab-grown diamonds held in New York.

20161019_5-carat-white-lab-grown.jpg
This file photo shows a 5.19-carat CVD-grown diamond recently graded by the Gemological Institute of America. While this diamond was submitted without proper disclosure, attendees at a recent forum on synthetics say that it’s detection of lab-grown melee that’s a more pressing problem for the industry. (Photo credit: Johnny Leung and Tony Leung, courtesy of GIA)

A few weeks ago in New York, I had the opportunity to attend a day-long forum on lab-grown, or synthetic, diamonds organized by the U.S. Jewelry Council.

The purpose of the forum was not for the mined diamond industry to align itself against the diamond growers; in fact, it’s worth pointing out here that there are well-known diamond companies/dealers that have their hands in both.

As just one example, Royal Asscher--a 162-year-old family business that invented the cut that still bears its name and cleaved what remains the largest diamond ever mined, the Cullinan--had a line of colored lab-grown diamond jewelry called Rebel Chique and now is part-owner of a company selling lab-grown diamonds on Amazon.

Instead, the forum was put together to discuss the issue of undisclosed lab-grown diamonds, those stones that slip into the supply pipeline undetected.
Here’s (some of) what I learned.

Takeaway No. 1: You are accountable if you sell a lab-grown diamond as natural. This is a point that came up even before lunch and, for me at least, was pretty clear cut and simple.

Yet people in the audience kept asking questions about it, laying out myriad scenarios in which a sale involving an undisclosed synthetic diamond might go down. Would I be liable if this happened? What about that?

But, alas, the answer was always the same: You--whether you are a jeweler, an appraiser, a diamond manufacturer or a diamond dealer--are liable if a diamond that is lab grown is sold as natural.

Takeaway No. 2: Because of the above, jewelers need to exercise quality control over their inventory. But, sadly, many of them don’t. So, what constitutes quality control, exactly?

JVC President and CEO Cecilia Gardner said it does not mean jewelers need to check every single item in their inventory, but have to have some “demonstrable activity” that shows that they are selling products that have been checked and that they believe are as represented.

When I later asked her if there’s a specific percentage of inventory she would recommend checking-- say, 20 or 25 percent--Gardner didn’t give me one, but recommended that jewelers test a “steady sampling” from all suppliers that is continuous and broad-based, with the overarching idea being that they’ll be able to demonstrate due diligence if needed.

By “checked,” she meant sent to a reputable grading lab unless, of course, the jeweler has their own testing equipment.

Relying on the word of your suppliers

alone is not enough. In other words: Work with vendors whom you trust, but also verify.

Will this prevent you from being sued if you sell a product that’s not what it was purported to be? No.

Will it help you in court more than standing up and saying “nothing” when asked what you did to ensure the diamonds in your stock labeled as mined were not lab grown? Yes.

The Jewelers Vigilance Committee actually has an entire publication on quality assurance and control. It’s called “Getting It Right.” It’s $20 for JVC members and $25 for non-members, and you can order it on the JVC website.

Takeaway No. 3: When one company gets hurt, everybody feels it. Diamonds are largely unbranded, so when a report on one jeweler who sold a lab-grown diamond as natural pops up on the 6 o’clock news, it gives consumers an unfavorable, if undeserved, view of the entire industry.

This is even truer today with the rapid-fire news cycle and the proliferation of, ahem, journalists looking for “content” to fill the endless number of websites and blogs that are out there. In other words, once a story is reported, it’s likely going to be shared thousands of times, morphing and growing in the re-telling. The internet, in case you haven’t noticed, is not a stickler for accuracy, nor is it a platform where nuance travels well.

Despite the fact that players along all points of the pipeline feel the effects when it comes out that one individual has been dishonest, there is no industry-wide standard for the machines used to separate lab-grown diamonds from mined ones, or industry-wide policy on dealing with those who submit stones without proper disclosure, one presenter pointed out.

As she put it, “When there is an issue--be it conflict diamonds or be it the FATF report or be it any issue that comes out--then we all suffer. It’s very different than the textile industry … when there’s an issue with Nike or Puma, it’s condensed to that brand. But with us, we all suffer.

“And so it’s very important that we as an industry are aligned and agree on a system to protect our product and protect consumer confidence in our product.”

Takeaway No. 4: There are machines available for detecting lab-grown melee, but the technology isn’t where people seem to want it to be. A speaker from a major grading laboratory said that he gets this question a lot: Why doesn’t his lab have one machine that’s inexpensive, compact and can quickly screen for absolutely everything?

The answer is simply that the technology isn’t there yet, but the industry’s biggest grading labs do recognize that undisclosed melee is a problem, and they say they’re working on it.

Just as two examples, De Beers’ International Institute of Diamond Grading and Research (IIDGR) introduced an automated melee screener back in 2014, and followed this year with a much less expensive machine called the PhosView. That machine, however, only detects high-pressure, high-temperature (HPHT) grown diamonds and was created specifically for one market--India.

The Gemological Institute of America, meanwhile, rolled out a melee analysis service just this year.

According to what we heard at the forum, more machines and services are in the works, so stay tuned.

Takeaway No. 5: There is a standard for saying something is “green.” This has been covered before but came up during the forum, so I thought it was worth a brief mention here.

Many lab-grown diamond companies describe their diamonds in advertising as being “green” or “eco-friendly” and use words such as “greenhouse” or “foundry” to try to shape consumers’ perception of the product.

In reality, however, these gemstones are made in what is most accurately described as a factory--a factory that burns fossil fuel to function.

Because of this, the Federal Trade Commission, which has an entire guide dedicated solely to environmental marketing claims, might view claims of lab-grown diamonds being “green” or “eco-friendly” as a bit of a stretch.

As such, the JVC’s Gardner recommended that such claims be avoided.
Michelle Graffis the editor-in-chief at National Jeweler, directing the publication’s coverage both online and in print.

The Latest

Sotheby’s Paraiba tourmaline 7.70 carats
AuctionsJun 18, 2026
Paraíba Tourmalines Sell for $3.4M at Sotheby's

The recent high jewelry auction, which also featured the sale of a 10-carat blue diamond, was “a celebration of color.”

Almasika Le Cauri Endiamanté Drop Earrings
CollectionsJun 18, 2026
Michelle Obama Wears Almasika Earrings Symbolizing Feminine Power

She wore the “Le Cauri Endiamanté” earrings, our Piece of the Week, in the Obamas’ first dual portrait for the Obama Presidential Center.

Graphic for Episode 6 of My Next Question featuring Michelle Orman
PodcastsJun 17, 2026
Episode 6: Las Vegas 2026-Trends, Traffic, Broken Bathrooms

Couture’s Michelle Orman joins Amanda Gizzi and Michelle Graff for this special post-Market Week episode of My Next Question.

Brought-To-By-Article-Top-Image.jpg
Brought to you by
Wedding Band Trends 2026: Personalization Takes Center Stage

Colored gemstones, artisan finishes, mixed metals, and meaningful details are shaping demand in bridal jewelry.

SSEF emerald with filler
GradingJun 17, 2026
SSEF Issues Warning on Refilled Emeralds

The lab is seeing emeralds with filler added post-testing enter the market, accompanied by reports that indicate little to no treatment.

Weekly QuizJun 17, 2026
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Former Patek Philippe President Philippe Stern
WatchesJun 17, 2026
Patek Philippe’s ‘Visionary’ Leader Philippe Stern Dies at 88

The third generation of the Stern family to head Patek Philippe, he navigated the “quartz crisis” and preserved the brand’s independence.

James Avery Schertz Texas storefront
MajorsJun 17, 2026
James Avery to Revamp In-Store Retail Experience

The Texas-based jeweler is gradually rolling out a new experience-forward layout in its stores.

DCA-NJ-article-1872x1052-060826.jpg
Brought to you by
Building the Future of Jewelry Retail: DCA Expands Education, Leadership Development, and Workforce Solutions

DCA is preparing the next generation of professionals by supporting workforce development, leadership growth, and career advancement.

Seattle Seahawks Championship Ring by Jason of Beverly Hills
MajorsJun 17, 2026
Seahawks’ Super Bowl Ring Blends Meaningful Design, Technical Craftsmanship

The Super Bowl LX champions were honored with diamond and blue sapphire rings by Jason of Beverly Hills.

Marianna Smirnova
Policies & IssuesJun 17, 2026
Community for Ethical Jewelry Names New Executive Director

Marianna Smirnova previously spent a decade working with the Responsible Minerals Initiative, in addition to other relevant roles.

NBA Larry O'Brien Trophy
MajorsJun 16, 2026
5 Things to Know About the 2026 NBA Championship Trophy

The New York Knicks took home the Larry O'Brien Trophy crafted by Tiffany & Co.

Lionheart Cactus Pendant
TrendsJun 16, 2026
Post-Vegas Jewelry Trend Report: Big Beads, Western Flair, White Metals

Associate Editor Natalie Francisco lists the trends she spotted during Jewelry Market Week that will dominate the second half of 2026.

Oscar Heyman ruby ring
SourcingJun 16, 2026
GemGuide Updates Ruby Prices

Its app now reflects increased prices for Mozambique ruby, as well as changes to its Burma ruby charts.

Alicia Arnold
MajorsJun 16, 2026
Sasha Primak Hires New Design Director

The manufacturer has tapped Alicia Arnold, the former director of custom design at Tiny Jewel Box.

Boulle family in hard hats
IndependentsJun 15, 2026
DeBoulle Diamond & Jewelry to Renovate Dallas Flagship

The revamped, elevated space will feature a two-story Patek Philippe atelier and a rooftop patio for parties.

G Shock Coca Cola
WatchesJun 15, 2026
G-Shock, Coca-Cola Partner on Bottle-Inspired Watch

The special-edition piece marks the 140th anniversary of the iconic beverage brand.

Buddha Mama earrings
TrendsJun 15, 2026
Amanda’s Style File: Tiny Charms Are Trending

Here are 13 small charms to inspire your layered looks this summer.

16th century flower cluster hogback diamond ring
AuctionsJun 12, 2026
16th-Century ‘Hogback’ Diamond Ring Going Up for Auction in London

Found by a metal detectorist, the ring likely belonged to a wealthy, possibly royal, owner, said Noonans.

Chouette Designs Margaux Ring
CollectionsJun 12, 2026
Chouette Designs To Launch Collection Celebrating All Types of Love

Our Pride Month Piece of the Week, the “Margaux” ring, is part of the wife-and-wife team’s new “Lovestoned” collection.

CBG logo
Events & AwardsJun 12, 2026
CBG Announces Plans for Phoenix Show

The group has named the keynote speaker and announced a new pavilion for its next event, which is slated for September.

Grandview Klein diamonds
SourcingJun 11, 2026
Grandview Klein, London Jewelers Partner To Cut 63-Carat Rough

The big stone will be fashioned into a 20.26-carat diamond in celebration of the retailer’s 100th anniversary this year.

Marie-Laure Cérède
MajorsJun 11, 2026
Former Cartier Creative Director To Head Chanel’s Jewelry Creation Studio

Marie-Laure Cérède will join Chanel as the new director of its jewelry creation studio, starting in October.

Smiling Rocks booth at JCK Las Vegas 2026
Lab-GrownJun 11, 2026
Smiling Rocks’ ‘Wish Jar’ Generates 100+ Wishes in Las Vegas

At the JCK show, the lab-grown diamond brand teamed up with Jewelers for Children to support Make-A-Wish India.

Ilana McCabe
SourcingJun 11, 2026
Signet Jewelers Exec Joins Diamonds Do Good Board

Ilana McCabe is Signet’s vice president of public relations and brand communications.

Azure blue diamond and 5.04-carat fancy vivid blue diamond
AuctionsJun 10, 2026
31.62-Carat ‘Azure Blue’ Diamond Sells For $8M+ at Christie’s

It was a banner day for blue gemstones, with another blue diamond topping $8 million and a 41-carat sapphire going for $2.3 million.

Saks Fifth Avenue New York City storefront
MajorsJun 10, 2026
Saks Global Receives Bankruptcy Court Approval for Reorganization

The approval means the retailer is on track to exit bankruptcy proceedings this summer.

Jalen Javon Davis and Leslie La Vun Jones II
CrimeJun 10, 2026
2 Suspects Arrested in Texas Jewelry Store Robbery

The men are believed to be part of the group of several masked suspects that robbed Marc Robinson Jewelers in April.

×

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