Lab-Grown Diamond Price Chart 2020 to 2026, the 80 Percent Collapse

A 1ct G VS2 round brilliant lab-grown diamond cost around $3,400 per carat in early 2020. The same specification sits between $700 and $900 today. No scandal, no market panic. Just supply overtaking demand faster than the industry predicted.

For context on where lab-grown and natural diamond prices stand right now, our analysis of the 86 percent spread between lab and natural diamonds covers the full current picture. This post is specifically the price history: year by year, with the drivers behind each move.

[Image: CaratHunter Lab Price Index, 1ct G VS2 Round Brilliant, 2020 to 2026. Insert editorial chart.]

The year-by-year price table

The table below tracks the approximate median price per carat for a 1.00 to 1.49ct round brilliant lab-grown diamond at G VS2, drawn from our index and public retailer archives. The 2020 and 2026 figures are index anchor points. Intermediate years use ranges to reflect variation across each year.

Year	Approx. price/ct (1ct G VS2 Round, lab)	Context
2020	$3,400	Index baseline
2021	$2,600 to $3,100	Early production growth
2022	$1,600 to $2,200	CVD inflection, prices accelerate downward
2023	$1,100 to $1,400	China and India exports surge
2024	$900 to $1,100	Compression continues
2025	$750 to $950	Floor establishes
2026	$700 to $900	Current index median

Six years. About 80 percent gone. The steepest drop came between 2022 and 2023.

2022 and the CVD inflection

The inflection year is 2022. Not because consumers turned away from lab-grown diamonds, but because CVD reactor capacity came online at a scale the market had never absorbed.

CVD, chemical vapour deposition, is how most modern lab-grown diamonds are produced. A mixture of methane and hydrogen gas is energised into a plasma state inside a reactor chamber, and diamond crystals grow on a substrate over days to weeks. The process is precise and energy intensive, but it's fundamentally reproducible. Once a reactor design is refined, you can build more reactors. Through 2021 and 2022, producers across India and China did exactly that.

The 2019 to 2021 period saw steady expansion in production capacity, but supply and demand were growing in rough proportion. Prices held in the $2,500 to $3,400 range, retailer margins were healthy, and the category was moving from niche to mainstream at a pace the market could manage. Then reactor numbers crossed some threshold and the price response was severe.

Hundreds of reactors became thousands. Wholesale prices started falling faster than retailers could adjust. Retailers sitting on inventory purchased at 2021 wholesale prices found new stock arriving at a fraction of that cost. Consumers who compared prices across a few retailers noticed they were falling, and the incentive to wait reinforced the pressure on sellers.

The retailers most exposed were those who had built their positioning around lab-grown as a premium alternative, a better-value version of a natural diamond at a meaningfully lower price. When prices started falling sharply within a single quarter, that positioning became awkward. Some responded by leaning harder into size upgrades. Others reduced margins to clear inventory. A few pulled back from the category.

That dynamic, prices falling while consumers were actively in the market, is what makes the lab-grown price story unusual. This isn't a story about a category losing relevance. It's a story about manufacturing economics reshaping a luxury goods segment in real time.

China, India and the scale shift

India and China drove the supply surge, but differently.

India's Surat district had been the world's diamond cutting and polishing centre for decades before lab-grown became a mainstream category. When CVD production started scaling, the infrastructure was already in place: skilled labour, polishing facilities, established export channels. Many operations that had been finishing lab-grown rough sourced from elsewhere began producing it domestically. The transition was fast.

China's contribution was industrial in a different sense. Chinese manufacturers brought factory-scale capital investment and a production throughput mindset that compresses per unit costs quickly. What had begun as a high precision scientific process started resembling semiconductor manufacturing economics: large investment, process optimisation, volume.

By 2023, combined output from India and China was large enough to move global wholesale prices even as consumer demand was growing. Neither country acted against market interests. They responded to manufacturing economics and export opportunity. The result was a supply curve that outran demand.

HPHT production, the older high pressure, high temperature method, also expanded through this period, though CVD dominates new capacity. The two methods produce stones with slightly different growth patterns and trace element characteristics. We've covered CVD versus HPHT lab-grown diamonds separately for buyers who want to understand the distinction before they buy.

Consumers kept buying

There's a persistent alternative reading of the price collapse: that it reflects consumer rejection of lab-grown diamonds. The data says otherwise.

Active lab-grown listings in our index have grown substantially year on year across every major shape category. Round brilliants alone account for over 2.39 million active lab-grown listings in our current database, against roughly 1.4 million natural round listings. A category in retreat doesn't look like that.

Consumer acceptance is high, particularly among buyers under 40. Lab-grown diamonds are chemically, physically and optically identical to mined stones, and for buyers who understand that, the price difference is the point rather than a compromise. The buyer who could stretch to a 0.8ct natural in 2020 can now consider a 1.5ct lab-grown at a comparable price point. That size premium is meaningful, and it keeps the volume high.

Demand grew. Supply grew faster.

Where the market sits right now

The discount to natural is consistent across shapes, but the spread varies. Current medians from our index, across all active listings:

Shape	Lab $/ct	Natural $/ct	Lab discount
Round	$388	$1,978	80.4%
Oval	$441	$2,342	81.2%
Cushion	$503	$2,691	81.3%
Emerald	$440	$1,976	77.7%
Radiant	$397	$2,667	85.1%
Baguette	$315	$2,854	89.0%

Baguettes at $315 per carat sit at the most compressed end of the market. Radiant cuts at $397 and 85.1% below natural aren't far behind. Rounds, the largest volume category across both lab and natural, sit at $388 per carat.

Emerald cuts show the smallest discount at 77.7%. They're less tolerant of inclusions that a brilliant cut's facet pattern might otherwise hide, and that additional cutting precision appears to hold the floor slightly higher. Not dramatically higher. Slightly. You can compare all of these live in our lab-grown diamond search, which shows current pricing across every shape, carat range and grade.

Resale and what earlier buyers face

A stone purchased at $3,400 per carat in 2020 isn't worth $3,400 per carat today. The secondary market for lab-grown diamonds prices stones at or near current retail, not historical purchase prices. Retailers offering credit when you trade in an existing stone base those offers on current wholesale pricing. Secondary market buyers apply the same logic.

This is what happens to manufactured goods when production costs fall sharply. The stone's quality hasn't changed. The market has repriced the category. Natural diamonds have their own pricing dynamics and aren't immune to market shifts, but the supply mechanism that compressed lab-grown prices doesn't apply to mined stones in the same way.

Lab-grown diamond depreciation is worth understanding before purchase too. A stone bought today at $700 to $900 per carat carries real downside risk if production costs continue to fall, which they may. We've covered the secondary market in detail, including what retailers actually offer when customers trade in and where resale platforms sit, in our piece on lab-grown diamond resale value.

What we're watching

We track prices. We don't forecast them.

The conditions driving the 2022 to 2026 decline remain in place. CVD reactor construction hasn't slowed. Indian and Chinese production volumes continue at scale. The per unit cost of growing diamond rough falls as manufacturers refine their processes. There's no visible lever on the supply side that would reverse this trajectory in the near term.

Where prices stabilise, whether near current levels or lower, depends on variables we can't model with confidence: retailer inventory decisions, wholesale market consolidation, whether any major producing region shifts its export posture, and how quickly consumer demand absorbs ongoing new production. Precise forward projections for lab-grown diamond prices are speculation. We don't offer them.

The $3,400 per carat environment from 2020 is not coming back.

This post is CaratHunter's canonical price history reference for the lab-grown diamond market, 2020 to 2026. Weekly market briefs and category analyses published on this site link here when they reference the historical price chart. The table above carries the key data points; the URL stays fixed as we add new index data.