How China's Demand Shift Crashed Lab-Grown Diamond Prices, and What's Happening Now

Quick answer: Lab-grown diamond prices crashed because production in China and India grew far faster than demand while China’s wedding market and consumer confidence weakened; as of mid-2026 wholesale prices were still falling about 13% to 14% a year, though the decline is easing.

A market that everyone assumed would only go up quietly cracked in half. Here's the real story of how it happened, and what the latest data actually show: the decline is easing, but lab-grown prices were still falling in 2026.

Watch: The Story Behind the Crash

Video analysis: why lab diamond prices fell sharply through the early 2020s, and how China's demand shift accelerated the slide.

The Rise (2018-2022)

• Lab diamonds have essentially the same chemical, physical and optical properties as mined stones.
• Major jewelry brands adopted lab-grown stones across the board.
• By 2022, lab-grown diamond jewelry made up about 10% of global diamond jewelry sales, according to analyst Paul Zimnisky.

The Breakpoint: Too Much Supply, Not Enough Demand

Supply: China became the world's top producer, with approximately 3 million carats (mostly grown using HPHT) of the 6 to 7 million carats produced worldwide in 2020, while India's CVD output accelerated dramatically. Rough supply grew faster than buyers could absorb.

Demand: Marriages in China dropped 10.5% to 6.83 million in 2022, the lowest since records began in 1986. Add weak job prospects for young people and a real-estate downturn eating into household savings, and you get exactly what you'd expect: fewer proposals, fewer rings.

Culture: Chinese consumers turned to gold, which they consider a safe haven for investment, which cooled appetite for diamonds of any kind, not just lab-grown.

Price Impact Through 2025

Lab-grown diamond prices fell dramatically and consistently from around 2020 through 2025, wholesale and retail both, as production scaled far faster than demand could keep up. By early 2025, wholesale lab-grown prices were down 90% to 95% compared with 2015, and De Beers said lab-grown prices had fallen over 90% when it closed its Lightbox brand. By the most recent data, lab-grown stones commonly sell for a small fraction of comparable natural diamond prices for matching 4Cs, including at the popular 3 carat lab diamond ring size.

Where Things Actually Stand Now, Heading Into 2027

The steepest phase of the crash may be behind us, but prices have not turned around. JCK reported in August 2026 that wholesale prices for loose lab-grown diamonds fell another 14% year over year in the first quarter of 2026 and 13% in the second quarter, a slightly milder drop. The biggest declines are now in larger sizes, which matters for lab grown diamonds 3 carat buyers: the same report found retail markups still above 80% over wholesale.

In short: the decline is slowing, but it has not stopped.

So, Are Lab Diamonds "Over"?

Not even close. Expect two clear lanes going forward. Everyday luxury, meaning lab-grown, offers bigger carat sizes, no mining involved, and full diamond brilliance at accessible prices. Rarity and tradition, meaning natural, stays reserved for buyers chasing perceived scarcity and legacy value. For most couples, the decision now comes down to values and budget, not sparkle, since both options look identical to the eye. That's a big part of what we mean by the future of jewelry at Future Jewelry: honesty and value over pure rarity.

Buyer Playbook

• Buy for love, not resale. Treat a lab diamond like a great value purchase, stunning, created without mining, and a genuinely strong deal, not a speculative asset.
• Max your 4Cs. Prices are already at accessible levels, so put your budget toward better cut, clarity, or a bigger carat instead of waiting on further drops.
• Insist on certification. Choose IGI or GIA graded stones from reputable retailers. IGI reports give full 4Cs grades, while GIA, since October 1, 2025, classifies lab-grown diamonds as Premium or Standard.
• See current pricing for real pieces. Check our price per carat guide, or browse a real 3 ct Oval Solitaire, Yellow Gold before you set a budget.

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References and Resources

• International Gemological Institute (IGI), global grading authority for lab-grown and natural diamonds.
• Gemological Institute of America (GIA), diamond grading standards, education, and research.
• How Chinese Consumers Crashed the Lab Grown Diamond Market (YouTube), video reference summarized in this article.

Sources

• Source: GIA: Is There a Difference Between Natural and Laboratory-Grown Diamonds?
• Source: JCK: Q&A with Paul Zimnisky (2022)
• Source: GIA Gems & Gemology: Laboratory-Grown Diamonds, An Update on Identification (Summer 2024)
• Source: Rapaport: Why China's Diamond Market Is in Dire Straits (2024)
• Source: JCK: The Narrative About Lab-Grown Diamonds Is Changing (2025)
• Source: JCK: De Beers Shutting Down Lightbox (May 2025)
• Source: JCK: Lab-Grown Diamond Wholesale Prices Are in Freefall (August 2026)
• Source: GIA: Updated Laboratory-Grown Diamond Services Launch October 1 (2025)

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