Should Independent Jewelers Sell Lab-Grown Diamonds?

Yes, sell them. That question was settled by your customers, not by the trade. The question that decides whether the category makes you money is a different one, and almost nobody writes about it: do you own the stone, or does someone else own it until the moment it sells?

The advice a jeweler finds on this subject tends to split into two camps that are both useless at the counter. One says lab-grown is the biggest opportunity in a generation. The other says it is a commodity that will hollow out your store. Neither camp does the arithmetic that actually decides it.

The two numbers that look like they contradict each other

Lab-grown center stones account for 61% of engagement rings, according to The Knot Worldwide’s 2026 Real Weddings Study of 10,474 US couples married in 2025. Lab-grown also accounts for just 15% of independent jewelers’ diamond sales by value, against 85% for natural, per De Beers point-of-sale data from 950 independent retailers. Both are true. They measure different things.

The first number counts rings across every channel, including the online sellers you do not compete with on price. The second counts dollars through the register at stores like yours. Put them together and you get the shape of the category: lab-grown is where the units are, natural is still where the value is, and a jeweler who reads only one of those numbers makes a predictable mistake.

Read only the 61% and you over-buy inventory in a falling market. Read only the 15% and you write off the category most of your engagement traffic is now asking for. The couples buying lab-grown are spending an average of $4,600 and wearing an average of 1.9 carats. That is not a cheap customer. That is a customer who reallocated the budget.

One caveat worth stating plainly, since the sources rarely do: De Beers is a natural-diamond producer. Their point-of-sale panel is solid and it is the best read available on what independents actually ring up, but they are not a neutral party on this question. Weigh it accordingly.

Why owning the inventory is the part that hurts

Lab-grown wholesale prices are still falling, which means any stone sitting in your case is worth less each quarter you hold it. The wholesale index fell 13% year over year in the second quarter of 2026 and is down 96% since tracking began in July 2018, per industry analyst Edahn Golan. Your capital is parked in a depreciating asset.

The fall is decelerating, and that detail matters more than the headline. Full-year 2025 was down 26%; the second quarter of 2026 was down 13%. One carat rounds actually rose 1%. The declines are concentrated in the larger sizes that used to carry the department: 1.50 to 1.99 carat stones fell 11% and two carat stones fell 20%. A three carat VVS D round wholesaled around $126 per carat this year, roughly 30% cheaper than 2025.

So the risk is not evenly spread. The small commercial goods are flattening out. The big stones, the ones a jeweler stocks because they feel like the profitable end of the case, are still repricing under you.

Here is the number that should decide your buying: the lab-grown inventory-to-sales ratio at US jewelry retailers has climbed from the high single digits in 2020 to nearly 50%, according to analyst Paul Zimnisky. The trade as a whole bought this category faster than it sold it, in the one product where waiting costs you money.

The ownership test

Before any lab-grown stone goes into your case, run it through three questions. This is the whole framework, and it takes about thirty seconds per stone.

One: can I sell this without buying it first? If the answer is yes, and for most lab-grown it is, then buying it is a choice you are making rather than a cost of doing business. Memo, virtual inventory feeds, and order-in all exist precisely so the supplier carries the depreciation instead of you.

Two: if this sits for twelve months, what is it worth then? Apply the current trajectory to the specific size you are considering. A one carat round is roughly flat. A two carat is not. Stock accordingly, and notice that this question alone kills most of the impulse buys at trade shows.

Three: what am I attaching to it? If the honest answer is nothing, you are a price-comparison shop for a commodity and the customer will find it cheaper online in about four minutes. If the answer is a custom mounting, a design conversation, sizing, appraisal, and a relationship, the stone is a doorway rather than the product.

A stone that fails question one and question three should not be in your case. A stone that passes all three is worth owning.

Margin percentage is not margin dollars

Your gross margin percentage on lab-grown probably looks excellent, and that is the trap. Retail markups on lab-grown still exceed 80% over wholesale and have barely moved between 2025 and 2026, per Zimnisky. The percentage is holding beautifully while the dollar figure underneath it shrinks, because the wholesale cost it is calculated against keeps falling.

Work it through on your own numbers. A strong margin percentage on a stone that cost you a few hundred dollars is a smaller deposit in your account than a thinner percentage on a natural stone at several thousand. Percentage pays no rent. If you replace natural units with lab-grown units one for one and change nothing else, revenue falls even though every report you run looks healthier.

There are only two ways out of that, and you need both. Sell more transactions, or attach more value to each one. Which is why the third question in the ownership test is the one that actually pays.

The same distinction runs through metal costs, and it is worth reading alongside this one: pricing custom jewelry when the gold price keeps moving covers the commodity line in a quote, which is the other half of the same problem.

How to stock lab-grown without carrying the depreciation

Sell from a virtual inventory and buy the stone only when the customer commits. Every major lab-grown supplier now offers feeds with lab reports, photography, and 360-degree video, so the customer sees a real stone with real certification and you never wire money for it. Keep a small physical selection for people who need to hold something, and let the feed carry the depth.

Memo is the middle path: the supplier retains ownership while the goods sit with you, typically for 30 to 90 days. One accounting caution that catches stores out. Consigned goods are not your asset, so they do not belong on your balance sheet as inventory. Track them separately or your numbers will tell you a story about your business that is not true.

Made-to-order does the same job at the mounting level. If the ring is built after the deposit rather than before, your capital is in the customer’s hands instead of your safe. That requires the customer to buy something they cannot yet touch, which is a real objection and a solvable one.

What to tell a customer who asks what it will be worth later

Tell them the truth: buy it for what it is, not as an asset. A lab-grown stone bought today will not resell for what they paid, the secondary market for them is thin, and the supply is unlimited by definition. Say that at the point of sale, in your own words, before they find out somewhere less friendly.

You will notice search results happy to quote a resale-retention percentage. The figures out there run from about 15% to 90% depending entirely on who is publishing and what they sell, and none of them show their method. Do not repeat a number you cannot defend. The direction is the honest answer, and the direction is clear.

This conversation is not really about lab-grown. Consumers are routinely shocked at the gap between an insurance appraisal and what a store will pay them, and that gap exists for natural stones too. Trade forums are full of jewelers patiently explaining that an appraisal is a replacement-cost document for an insurer, not a resale quote. Lab-grown simply makes the gap wider and harder to soften.

The practical move is a written policy you actually apply. Decide now whether you take lab-grown trade-ins, on what terms, and whether you offer an upgrade credit toward a larger piece. An upgrade program costs you less than a buyback and keeps the customer in your store. What ends badly is having no policy and improvising it in front of someone who is already upset.

Where the natural stone still earns its place

Keep natural in the case, and keep it where value concentrates. It is still 85% of independent diamond sales by value, and De Beers’ retail panel shows lab-grown sales dropping off noticeably once stones reach three carats and above. At the top of the case, the argument for rarity still lands with the customer who is there for it.

The failure mode is picking a side and evangelizing it. A jeweler who talks a lab-grown customer out of their choice loses the sale and the referral. A jeweler who dismisses natural loses the buyer who came in specifically for a stone that came out of the ground. Stock both, learn the honest case for each, and let the customer tell you which one they are.

What differentiates you when the stone is a commodity

When the center stone is available everywhere at a published price, the design is the only thing left that is yours. That is not a consolation prize. Lab-grown buyers are spending an average of $4,600 and putting a larger stone in the ring, which means budget moved from the rock to everything around it, and everything around it is your work.

This is where a design tool on your own site does honest work. With Ring Pro, the white-label 3D ring builder, the shopper picks the metal, the setting, and the stone and sees a price range you configured. They arrive at your bench having already chosen a mounting instead of asking you to price a stone against a screenshot from a competitor. The conversation starts at the part you actually make money on.

For anything outside the standard configurations, Studio AI renders the piece from a description in seconds, so the customer can see their idea before committing. That is the mechanism behind closing the customer who keeps saying they want to think about it, and it is the same reason capturing the design along with the contact details beats a plain contact form. If quoting is where your custom work slows down, start instead with quoting custom jewelry faster without underpricing your work.

The short version

Sell lab-grown, because 61% of engagement rings now have a lab-grown center stone and that is your traffic. Do not own more of it than you have to, because wholesale is still falling and the trade already let its inventory-to-sales ratio reach nearly 50%. Run the ownership test on every stone. Watch margin dollars rather than margin percentage. Keep natural where the value concentrates, especially above three carats. Tell the truth about resale before someone else does. And put your effort into the design around the stone, because that is the part a website cannot undercut.

JewelerStudio runs the ring builder, the AI renders, the lead capture, and the follow-up as one white-label system on the site you already have, from $149 to $849 a month with a 7-day free trial. Book a demo to see it configured with your own metals and settings, or see pricing first.