Editors

A Quick Review of the FTC’s Rules on Lab-Grown Diamonds

EditorsApr 05, 2019

A Quick Review of the FTC’s Rules on Lab-Grown Diamonds

Our Editor-in-Chief Michelle Graff offers a refresher following the Federal Trade Commission’s distribution of eight warning letters regarding advertisements for lab-grown diamond jewelry or diamond simulants.

20190405_FTC_logo_header.jpg
Earlier this week, news broke that the FTC had sent letters to eight companies warning them that their advertisements for lab-grown diamond jewelry or diamond simulants (CZ, moissanite, etc.) could be deceptive.

The distribution of these letters comes less than a year after the commission’s long-awaited overhaul of the Jewelry Guides, the FTC-created rulebook that outlines the terms marketers should, and shouldn’t, use to describe jewelry to consumers.

When the new Jewelry Guides dropped last summer, it seemed, to me anyway, that many lab-grown diamond companies perceived the revisions to be a big victory for them, perhaps bigger than it actually was. They’ve since gone a little overboard with their marketing, either thinking that it was allowed or that nobody was watching or would notice.

But that, apparently, is not the case.

The FTC is paying attention and is interpreting the revised guides more strictly than some had expected, including Jewelers Vigilance Committee President and CEO Tiffany Stevens, whose organization is tasked with (among many other things) keeping the industry’s advertising in check.

Stevens told me in an email Thursday that, “We are extremely encouraged that the FTC is putting focus on our industry in this way at this time. The guides had not been updated since the ‘90s, and in our conversations with the FTC, we emphasized that the update really wasn’t complete until they took some enforcement action to demonstrate the meaning and limits of the new guides.

“We were seeing evidence of some players really creating their own reality and running wild beyond any reasonable interpretation of the new guides. We would reach out to stem the action and also see incidents in our mediation practice, but there is nothing like having such a loud and clear action from the federal government itself.”

All this being said, I thought in light of this week’s events, now would be a good time for a refresher on the FTC’s Jewelry Guides as they pertain to man-made diamonds and simulants.

1. If a product is a lab-grown diamond, then the fact that it is man-made must be clearly and conspicuously stated.

When the FTC released its revised Jewelry Guides in July 2018, much was made about the removal of the word “natural” from the definition of a diamond. Too much, in my opinion.

The FTC made the change to the definition of a diamond in its Jewelry Guides before the section on diamonds as a way of saying: We will lay out the guidelines in this coming section that apply to diamonds, and by diamonds we mean “a mineral consisting essentially of pure carbon crystallized in the isometric system” that was either mined from the earth or grown in a factory. 


Nothing changed about how lab-grown diamond companies, and sellers of lab-grown diamonds, have to describe the product to consumers.

The FTC says they still must make it clear that the product is man-made by using “clear and conspicuous” disclosure with the word diamond; the three terms the FTC recommends using are laboratory-grown, laboratory-created or [manufacturer name]-created.

Cultured is OK too, but it has to be “immediately accompanied, with equal conspicuousness” by one of the three terms; it cannot stand alone.

When “diamond” appears by itself, it still means a natural diamond.

And those three qualifying terms mentioned above, the FTC noted this week, must be “proximate” to the product description, not in a place where consumers aren’t likely to see them. It mirrors the rules the commission has laid out for paid posts by influencers, who are supposed to write “#ad” where people can see it, not bury it in the middle of a caption.

Companies cannot relegate disclosures to FAQ or education pages, with FTC Consumer Education Specialist Bridget Small noting in a blog published on FTC.gov Tuesday: “Some businesses only put information about how a stone was really made on a ‘diamond education’ webpage, rather than in or near an ad where shoppers were more likely to see it.”

2. Social media is a not a free-for-all. 

A lot of the advertising the FTC found to be problematic was spotted on social media, said Robert Frisby, an attorney with the commission who spoke to National Jeweler Thursday as an FTC staff member, not on behalf of the commission.

The FTC reminded companies that the Jewelry Guides and the truth-in-advertising provisions of the FTC Act apply on Instagram, Facebook and Twitter, too.

Frisby also urged marketers to be cautious when using hashtags, for two reasons.

First, if a marketer wants to use a hashtag for disclosure purposes—e.g., #labgrown—they have to consider the overall impression of the advertisement. Is that hashtag making it obvious enough to consumers what the product is?

Secondly, marketers need to be mindful of making claims with hashtags. For example, #diamonds might imply that a product is mined, since the FTC still considers “diamond” alone as referencing a mined diamond.

3. CZ and moissanite aren’t the same thing as diamond (either natural or man-made), and that must be clear too.

In addition to the ads for lab-grown diamonds, the FTC noted that it spotted advertising for simulated diamonds that implied the stone was either a lab-grown or mined diamond.

The commission “encourages” companies selling simulated diamonds to avoid describing their products in a way that “falsely implies” what they are selling has the same optical, physical and chemical properties as mined or lab-grown diamonds.

4. Be cautious when making “eco” claims. 

Several of the letters the FTC sent to allegedly offending companies noted that many businesses are advertising their jewelry as “eco-friendly,” “eco-conscious” or “sustainable.” The FTC advises against making such “unqualified” claims, meaning using the words without explaining exactly what they mean. 

“Some of the letter recipients, in our view, were not qualifying them adequately,” said Frisby.

For example, if a company is claiming its product is “eco-friendly” because it’s recyclable, or because it takes measures to use less energy or less water in the manufacturing process, then the ad has to state this. It can’t just state “eco-friendly” because there are too many ways consumers can interpret that.

In addition, companies need to have publicly available evidence backing up their claims, and the amount of scientific evidence that’s needed increases with certain claims, such as “carbon neutral.”

The FTC has an entire rulebook dedicated to “eco” claims, separate and apart from the Jewelry Guides. It is called the “Green Guides” and can be accessed on FTC.gov.

The JVC’s Stevens added a point I’ve made in writing about lab-grown diamonds on this blog before: a product cannot be labeled as “green” or “eco-friendly” simply because it is perceived to be “greener” than the same product next to it.

She explained it like this: “One of the recurring issues we see with the environmental claims is the use of relative standards (i.e., Michelle speaks 20 words of Spanish and Tiffany speaks one so Michelle is fluent in Spanish) rather than what the standard actually is under the [FTC’s] Green Guides, which is an absolute (i.e., Michelle is either fluent in Spanish or not, regardless of how competent the person standing next to her is.)”

Before I wrap up this blog, it’s worth noting that the FTC is not a law enforcement body; no one is going to prison for putting out diamond jewelry ads that violate the FTC’s Jewelry Guides.

However, the commission can levy fines, and, what might even be worse for these companies, the commission publicizes when it writes warning letters, which can result in coverage not just from trade press but consumer press as well.

Reuters picked up the story about the FTC’s warning letters, as did Ad Age.

The story even made it onto Page Six of the New York Post, which ran it with the headline, “Leonardo DiCaprio-backed diamond company accused of false advertising,” zeroing in on the Diamond Foundry. 

The FTC is not disclosing the names of the seven other companies that received warning letters without a Freedom of Information Act request. 

A spokeswoman for the Diamond Foundry said the company is limited as to what it can say at this point, but released the following statement: “We have received an inquiry from the FTC, which we take seriously and will respond to in comprehensive detail. We pride ourselves on being a lab-grown diamond producer, and this point of differentiation is what our success is built on. We have worked collaboratively with the FTC for years, and the FTC has been a great supporter of the industry and a champion of change for consumer transparency.”

The FTC is giving the companies it contacted 10 days to let the commission know how they plan to alter their advertising. 

The Diamond Foundry said it will share follow-up information when available. 

Stay tuned. I bet this isn’t the last we’ll hear from the FTC regarding the revised Jewelry Guides.

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

The Latest

Lady Wardington and diamond clip brooch
AuctionsFeb 26, 2026
Noonans to Auction Lady Wardington’s Jewelry

The jewelry collection belonged to “one of society's most glamorous and beautiful women of the mid-20th century,” said the auction house.

Rough diamonds from De Beers
SourcingFeb 26, 2026
Anglo American CEO Gives Insight Into De Beers Sale

The update came as Anglo took its third write-down on the diamond miner and marketer, which lost more than $500 million in 2025.

Smart Age Solutions CEO Emmanuel Raheb
ColumnistsFeb 26, 2026
Practical Ways Jewelers Can Leverage AI in 2026

Emmanuel Raheb discusses the rise of “GEO” and the importance of having well-written, quality content on your website.

TopImageCrop.jpg
Brought to you by
Is This You? Every Jeweler Has This Problem; We Have the Solution.

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

5 Star Jewelry Simi Valley California
CrimeFeb 26, 2026
Three Sentenced in California Jewelry Heist

Each received around four years for burglarizing a jewelry store and a coffee shop in Simi Valley, California, last May.

Weekly QuizFeb 19, 2026
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Catherine (Cathy) Aulick’s GIA Gianmaria Buccellati Foundation Award Winning Necklace Design
Events & AwardsFeb 26, 2026
GIA Names 2026 Jewelry Design Contest Winner, Retires Annual Award

Catherine Aulick, a GIA graduate, received the ninth and final Gianmaria Buccellati Foundation Award for Excellence in Jewelry Design.

Diamond engagement rings by designer Lorraine West
TrendsFeb 25, 2026
Engagement Ring Trends 2026: What’s In, and Why

We asked a jewelry historian, designer, bridal director, and wedding expert what’s trending in engagement rings. Here’s what they said.

dca-laptop.jpg
Brought to you by
DCA Enters a New Chapter in Jewelry Education

With refreshed branding, a new website, updated courses, and a pathway for growth, DCA is dedicated to supporting retail staff development.

New Forevermark store in India
SourcingFeb 25, 2026
7 Trends That Could Define the Diamond Industry’s Future

Experts from India weigh in the politics, policies, and market dynamics for diamantaires to monitor in 2026 and beyond.

My Next Question podcast with Marion Fasel and Natalie Francisco
PodcastsFeb 25, 2026
Episode 2: Jewelry Trends & Does the Red Carpet Matter?

Are arm bands poised to make a comeback? Has red-carpet jewelry become boring? Find out on the second episode of the “My Next Question” podcast.

Breitling Navitimer B19 Chronograph 43 Perpetual Calendar
WatchesFeb 25, 2026
Private Equity Firms Write Down Value of Breitling, Report Says

The Swiss watchmaker is battling declining sales amid a rapid retail expansion, according to a Financial Times report.

Rahaminov Diamonds Matriarch Campaign
CollectionsFeb 25, 2026
Rahaminov Diamonds’ New Campaign Honors Its Matriarch

The campaign celebrates Giustina Pavanello Rahaminov, the co-founder’s wife and matriarch of the family-owned brand, for her 88th birthday.

Borsheims Rachel Bennett
IndependentsFeb 25, 2026
Borsheims Names 2025 ‘Ike-It’ Award Winner

Rachel Bennett, a senior jeweler who has been with Borsheims since 2004, earned the award.

Stock image of shipping containers
Policies & IssuesFeb 24, 2026
IEEPA Tariffs Terminated, New 10% Tariff Already Imposed

After the Supreme Court struck down the IEEPA tariffs, President Trump imposed a 10 percent tax on almost all imports via a different law.

Sherry Smith, National Jeweler columnist and principal partner at The Retail Smiths
IndependentsFeb 24, 2026
Sherry Smith Now Principal Partner at The Retail Smiths

The industry veteran, who was with The Edge Retail Academy for 14 years, joins her husband at the company he founded in 2022.

Yafa Signed Jewels Van Cleef & Arpels Necklace and Earrings
IndependentsFeb 24, 2026
Yafa Signed Jewels to Open Store in Miami

The vintage signed jewelry retailer chose Miami due to growing client demand in the city and the greater Latin American region.

Jin Lee Chrono24
WatchesFeb 24, 2026
Chrono24 Names New VP, U.S. General Manager

Former Flight Club executive Jin Lee will bring his experience from the sneaker world to the pre-owned watch marketplace.

Eddie Sakamoto
SourcingFeb 23, 2026
Designer Eddie Sakamoto, a Humble Artist, Dies at 72

Sakamoto, who died in mid-January following a sudden illness, is remembered for his humility and his masterful, architectural designs.

NYCJAOS spring show 2026
Events & AwardsFeb 23, 2026
NYCJAOS Announces Four-Day Spring Show

The April event will feature a new VIP shopping day requiring a special ticket.

Dua Lipa Bulgari Brand Ambassador
TrendsFeb 23, 2026
Dua Lipa Is Bulgari’s New Ambassador

Bulgari chose the British-Albanian singer-songwriter for her powerful and enduring voice in contemporary culture, the jeweler said.

US Supreme Court building
Policies & IssuesFeb 20, 2026
Supreme Court Rules Against Most of President Trump’s Tariffs

In a 6-3 ruling, the court said the president exceeded his authority when imposing sweeping tariffs under IEEPA.

Headshot of National Jeweler columnist Peter Smith
ColumnistsFeb 20, 2026
Peter Smith: Happiness, Cavemen, and Jewelry Sales

Smith encourages salespeople to ask customers questions that elicit the release of oxytocin, the brain’s “feel-good” chemical.

Jewelers Vigilance Committee logo
MajorsFeb 20, 2026
Jewelers Vigilance Committee Names Julie Yoakum Board Chair

JVC also announced the election of five new board members.

Boucheron Faisceaux Brooch
CollectionsFeb 20, 2026
Boucheron’s ‘Faisceaux’ Brooch Heads to V&A Museum

The brooch, our Piece of the Week, shows the chromatic spectrum through a holographic coating on rock crystal.

Ann Weaver Bailey, also known as “Mama Ann”
IndependentsFeb 19, 2026
Bailey’s Fine Jewelry Co-Founder ‘Mama Ann’ Bailey Dies at 100

Raised in an orphanage, Bailey was 18 when she met her husband, Clyde. They opened their North Carolina jewelry store in 1948.

Material Good Boston Location Interior Rendering
IndependentsFeb 19, 2026
Material Good Opens Third Location

Material Good is celebrating its 10th anniversary as it opens its new store in the Back Bay neighborhood of Boston.

Original Miami Beach Antique Show sign
Events & AwardsFeb 19, 2026
The Original Miami Beach Antique Show Returns in March

The show will be held March 26-30 at the Miami Beach Convention Center.

×

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