Do Lab Grown Diamonds Hold Their Value? The Numbers

Short answer: no, not in the way people mean when they ask. A lab-grown diamond is a real diamond by every physical and regulatory definition, but its price is set by manufacturing capacity rather than scarcity, and that capacity has grown faster than demand for eight years running. If you buy one today and try to sell it in five years, expect to recover a small fraction of what you paid, and possibly nothing at all through the usual channels.

That is not an argument against buying one. It is an argument against buying one as a store of value. Below is what the price data actually shows, why it moves the way it does, and which parts of the ring do keep some worth.

What "holding value" actually means

Three different questions get bundled together here, and they have different answers.

• Resale value. What a stranger will pay you for the stone. This is where lab-grown does badly.
• Trade-in or upgrade credit. What the shop that sold it to you will credit against a future purchase. Policy-dependent, and worth reading carefully before you assume it exists.
• Insurance replacement value. What it costs to replace the ring with a like item. This tracks the retail market, so if lab-grown prices fall, your replacement cost falls with them, and your premium should eventually follow.

Almost nobody resells an engagement ring. The reason to care is narrower: you want to know whether you are overpaying today relative to where the market is heading.

The wholesale price data

Lab-grown diamond wholesale prices have been in a long decline. In an analysis published 7 July 2026, diamond industry analyst Edahn Golan reported that his LGD wholesale price index "is down 96% since we began tracking wholesale prices in July 2018."

The second quarter of 2026 was milder but still negative. Golan reported an average wholesale decline of 13% year over year for that quarter, with the drop concentrated in larger stones: 1.50 to 1.99 carat down 11%, and 2 carat down 20%. One size went the other way. Wholesale prices for 1 carat rounds rose 1% year over year.

Two honest caveats. Wholesale is not retail, and the gap between them has widened as retailers hold prices steadier than their cost base. And a 96% cumulative fall does not predict another 96%; the curve is flattening, and the 1 carat uptick suggests the most commoditised sizes may be near a production cost floor. What the data does establish is direction and consistency. Eight years, one direction.

Why the price fell, and why it is not about quality

Lab-grown diamonds are not inferior. GIA states that laboratory-grown diamonds have "the same crystal structure, consisting of tightly bonded carbon atoms", which results in "nearly the same chemical, optical and physical properties as natural diamonds." The FTC's Jewelry Guides work from the same premise, permitting terms such as "laboratory-grown" and "laboratory-created" for stones with "essentially the same optical, physical, and chemical properties as a mined diamond".

The price collapse is a supply story. GIA describes the two production routes: HPHT, where a capsule of carbon and metals is heated to "temperatures of 1300-1600°C (2400-2900° F) under pressures of 5-6 GPa," and CVD, which runs "at near-vacuum pressure" using microwaves at "temperatures of 700-1200 °C (~1300-2200 F)." Both are industrial processes. Reactor capacity expanded, yields improved, and the cost of producing a clean 2 carat stone fell hard. Nothing about the stone in your ring got worse. The cost of making the next one just got cheaper.

This is also why GIA is careful about how it words its reports. When GIA moved its laboratory-grown reports to full 4Cs colour and clarity specifications in October 2020, it noted that the specifications are "described on the same scale as GIA grading reports for natural diamonds, but that does not correlate to nature's continuum of rarity". An F VS1 lab-grown and an F VS1 natural look the same across a desk. Only one of them is scarce, and scarcity is what resale markets price.

Lab-grown versus natural, on the value question only

That last row is the real trade-off, and it is a legitimate one. If a 2 carat centre stone matters more to you than resale you will never pursue, lab-grown is the rational choice and I will say so plainly.

The disclosure rules that protect you either way

Canadian rules are specific. The Canadian Jewellers Association's guidelines on advertising lab-grown diamonds, written against the Competition Act, state that "the word synthetic, laboratory grown, or lab created must be placed immediately preceding the word diamond and neither word(s) shall be given greater prominence or emphasis than the other(s), nor may they be separated." And: "When the word 'diamond' is used alone it must be a natural diamond."

If a listing anywhere says "diamond" without a qualifier and the price looks like a lab-grown price, that is a problem with the seller, not a bargain. Ask for the report number and check it against the issuing lab's own database.

What does keep some value

The metal does, at scrap. Gold and platinum trade on commodity markets and a settingcan be melted, which puts a floor under it that a lab-grown stone does not have. Worth knowing: quality marking is not compulsory here. The Competition Bureau's guide to the Precious Metals Marking Act states that "it is not mandatory to mark or advertise a precious metal article for quality." An unmarked ring is not necessarily suspect, but a marked one is easier to verify later, and any mark that is applied must be truthful.

The craftsmanship does not hold value on resale, and neither does the retail margin. That is true of natural diamonds too.

If resale matters to you, do this

1. Decide honestly whether you will ever sell it. Most people will not. If the answer is no, stop optimising for it and buy the stone you like.
2. If the answer is maybe, buy natural. Not because lab-grown is worse, but because a secondary market exists for natural stones and barely exists for lab-grown ones.
3. Get a report from a lab you can verify. Growth method, colour, clarity and cut, from GIA or another accredited lab, with the number laser-inscribed on the girdle.
4. Do not pay a premium for grades you cannot see. The difference between VS1 and VS2, or F and G, is invisible without magnification in most stones, and it will not rescue the resale figure.
5. Insure it and update the appraisal. For lab-grown especially, an appraisal from five years ago is describing a market that no longer exists.

What to do next

Set your budget first, then decide which lever matters more to you: size or scarcity. Browse engagement ring settings to fix the style, then run a loose diamond search filtered to both natural and lab-grown at the same budget and compare what you get. Seeing a 1.2 carat natural next to a 2.1 carat lab-grown at the same CAD price settles the question faster than any article will. When you have chosen, finish the ring with metal, size and engraving, and preview it in 3D before you commit. More guides are on the blog.

Sources

• Edahn Golan, "After a 96% Decline, What's Next for Lab-Grown Diamond Prices? The Q2 2026 LGD Wholesale Price List," 7 July 2026. edahngolan.com
• Gemological Institute of America, "Simulants, Moissanite and Lab-Grown Diamonds," GIA 4Cs. 4cs.gia.edu
• Gemological Institute of America, "GIA Gets Specific on Laboratory-Grown Diamonds" (LGDR by GIA). gia.edu
• Federal Trade Commission, "In the Loupe: Advertising Diamond, Gemstones and Pearls," Jewelry Guides business guidance. ftc.gov
• Canadian Jewellers Association, "CJA Guidelines to Advertising Lab Grown Diamonds." canadianjewellers.com
• Competition Bureau Canada, "Guide to the Precious Metals Marking Act and Regulations." competition-bureau.canada.ca