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

Time CEO Jessica Sibley, Botswana President Duma Boko, and Botswana Minster of Minerals and Energy Bogolo Joy Kenewendo in New York
SourcingSep 30, 2026
Botswana’s President, De Beers CEO Say Diamond Demand Is Recovering

President Duma Boko spoke at back-to-back events in the city last week, touting Botswana’s stability and the diamond “bounceback.”

Oscar Heyman A Living Archive Holiday Book
CollectionsSep 30, 2026
Oscar Heyman’s Holiday Book Is ‘A Living Archive’

The catalog showcases 112 new, one-of-a-kind pieces amid highlights from the jeweler’s historic archive.

Gemfields rubies
SourcingSep 30, 2026
Gemfields Posts $98.5M Loss, Writes Down Value of Ruby Mine

Its Montepuez Ruby Mining operation in Mozambique, which is not yielding enough high-quality rubies, has taken a $125 million hit.

1872 x 1052 Gemolite.jpg
Brought to you by
Meet Gemology’s Next Generation Microscope: GIA® Gemolite® NXT Professional Edition

Experience gemstones with greater precision and comfort than ever before.

Hand holding a gas pump
SurveysSep 30, 2026
Consumer Confidence Falls to 12-Year Low in September

Those surveyed were worried about the present and the future, with write-in responses mentioning high oil and gas prices.

Weekly QuizSep 25, 2026
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
JA New York sign
Events & AwardsSep 30, 2026
Jewelers of America, JA New York to Host Networking Event

The event will take place on the evening of Oct. 26 in New York City.

Christy Bromberg
IndependentsSep 29, 2026
Christy Bromberg, Longtime Gift Buyer for Underwood Jewelers, Dies at 68

She is remembered for her joie de vivre, upbeat personality, genuine interest in other people, and love of the Alabama Crimson Tide.

Cover.jpg
Brought to you by
Your Piece Could Be the One Editors Talk About

Submit your pieces for a chance to win in this year's competition.

Dionne Warwick brown diamond ring from Sultan of Brunei
AuctionsSep 29, 2026
Dionne Warwick’s Jewelry Goes Up for Auction

Online bidding is open now for Julien’s sale of items owned by the “Walk On By” singer, whose final album comes out this fall.

Matt Stuller
Events & AwardsSep 29, 2026
Matt Stuller to Receive 2027 Gem Award for Lifetime Achievement

The founder and executive chairman of Stuller Inc. is being honored for his impact on the jewelry industry at the 25th annual Gem Awards.

Emmanuel Raheb, CEO of Smart Age Solutions
ColumnistsSep 29, 2026
Your Holiday Marketing Has a Bridal Blind Spot

December is the most popular month to propose, and jewelers need to keep that in mind when planning their holiday marketing.

Sandy Lerner’s 18-karat gold and diamond cat brooch
AuctionsSep 29, 2026
If You Love Cats, This Jewelry Auction Is for You

Cat ladies of the jewelry world, unite. Sandy Lerner’s collection of cat jewelry and other objects is going up for auction Wednesday.

De Beers London Vibrations high jewelry Echo transformable necklace
CollectionsSep 28, 2026
De Beers London Drops Water-Inspired High Jewelry Collection

“Vibrations” features several firsts for De Beers’ high jewelry, including the use of chalcedony and diamonds sourced from artisanal miners.

Zoë Kravitz Wearing Jessica McCormack’s Bows Collection
CollectionsSep 28, 2026
Jessica McCormack Turns to Classic Motif for New Collection

The “Bows” collection features three interpretations of the bow motif designed with Georgian and Victorian influences.

Amanda Coleman-Phelps and Guy Borenstein
Events & AwardsSep 28, 2026
Guy Borenstein, Troy Underwood Among the Professionals Honored at AGS Conclave 2026

The American Gem Society recognized industry members, one Guild, and a law enforcement official for their contributions to jewelry.

Jewelers Mutual Instappraise screenshot mock up
FinancialsSep 28, 2026
Instappraise, Jewelers Mutual Look to Simplify Jewelry Insurance

Through a new system integration, customers can now receive instant personal jewelry insurance quotes at the time of appraisal.

Rolex Datejust 31 ref. 6827 and Rolex Lady Datejust ref. 6917
WatchesSep 25, 2026
Smaller Rolex Watches Showing Strength on Secondary Market, Data Shows

Five of the 10 fastest-appreciating Rolex models on Bob’s Watches were Datejust 31 or Lady Datejust watches.

Daniel’s Jewelers storefront
MajorsSep 25, 2026
Sherwood Family Buys Back Daniel’s Jewelers from Private Equity

The Sherwood family and AJS Creations CEO Tejas Shah purchased the jewelry chain back from Palladium Equity Partners.

Brilliant Earth The Elizabeth Taylor Collection Campaign Imagery
Lab-GrownSep 25, 2026
Brilliant Earth Collabs with Elizabeth Taylor Estate on Jewelry Collection

“The Elizabeth Taylor Collection” uses lab-grown diamonds and gemstones in contemporary designs inspired by the icon.

Dana Rebecca Alexa Jordyn Marquise Marge hoops
TrendsSep 25, 2026
A Peek at Taylor Swift’s Game-Day Diamonds

The artist wore Dana Rebecca Designs’ marquise diamond-set gold hoops at the Chiefs game last Sunday. Now they’re our Piece of the Week.

Jewelry display
CrimeSep 24, 2026
From Conclave: Security Measures Jewelers Should Be Taking

JSA and Jewelers Mutual shared advice on spotting suspicious behavior, combatting cell phone jammers, and staying safe at home.

Header - One platform_ total protection_ seamless shipping (1).png
Supplier BulletinSep 24, 2026
Ship with Confidence with JM Shipping Solution

Sponsored by JM Shipping

8.03 carat natural fancy light blue diamond
AuctionsSep 24, 2026
8-Carat Blue Diamond Heads to UK Jewelry Auction

The fancy light blue diamond is estimated to fetch up to $2.6 million at Elmwood’s next week.

Secret Language of Victorian Jewelry by Amy Azzarito
TrendsSep 24, 2026
This New Jewelry Book Decodes the Secret Meaning in Victorian Jewelry

“Secret Language of Victorian Jewelry” unveils the meaning behind the symbols, motifs, and gemstones used in Victorian-era jewelry.

Lab-grown diamond tennis bracelets and rings from Kira Jewels
Lab-GrownSep 24, 2026
Kira Jewels Opens B2B E-Commerce Portal for Lab-Grown Diamond Jewelry

KIRAJewels.one gives retailers access to more than 500 SKUs of lab-grown diamond rings, earrings, necklaces, and bracelets.

Dana Rebecca Designs Tennis Bracelets Campaign Imagery
TrendsSep 23, 2026
Holiday Diamond Jewelry Trends: Layered Looks, Personalization

This holiday season, look to pieces that will help to fill out customers’ everyday diamond jewelry wardrobe, experts say.

The logo for The Diamond Collective, the new name for the Natural Diamond Council
SourcingSep 23, 2026
Organization That Promotes Natural Diamond Rebrands for Third Time

The Natural Diamond Council is now The Diamond Collective and has announced a new strategy under CEO Amber Pepper.

×

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