What's Going On in the Diamond Market Right Now (2026 Price Trends Explained)

TL;DR

• Diamonds between 0.70 and 1.99 carats haven't recovered to where they were two years ago. Every size in that range is still below its July 2024 wholesale level.
• The 2.00 to 2.99 carat range is the outlier. It briefly climbed above its 2024 baseline in spring 2025, driven by a real shortage of large rough diamonds, before easing back down.
• Lab-grown diamonds keep getting bigger. The average lab-grown center stone nearly doubled in size between 2019 and 2025, and buyers are getting noticeably more diamond for the same money.
• Supply cuts at De Beers explain a real chunk of what's happening at the top end of the size range.
• If you already own diamond jewelry, these price shifts can directly affect your insurance premiums, especially if your appraisal is more than a few years old.
• No, the market isn't "crashing." It's segmenting, hard, by carat weight. We'll walk through what that means whether you're buying, selling, or just insuring what you already have.

If you've priced out a diamond lately and it didn't match what you remembered from a couple years back, you're not imagining things. But the story isn't as simple as "diamonds are cheaper now." Some are. Some genuinely aren't. Here's what the data actually shows, and what it means for you.

Is the Diamond Market Crashing?

No. Prices are down in some carat ranges and holding steady or recovering in others. The "market crash" framing you might have seen in a headline oversimplifies a market that is segmenting sharply by size, not one that's collapsing across the board.

We track wholesale asking prices from IDEX, the diamond trade's pricing benchmark, going back to July 2024. Here's the short version: nothing between 0.70 and 1.99 carats has returned to where it started. The 2.00 to 2.99 carat range actually climbed above its 2024 level for a stretch in early 2025. And once you look past 3 carats into the 4 to 5 carat range, prices are up, not down, on a two year average.

That's not a crash. That's a market where big stones are gaining and small ones are still finding a floor.

Why Small Diamonds Are Losing Value While Big Ones Recover

The 0.70 to 0.99ct Problem

This is where the softness is most stubborn. Since July 2024, the 0.70 to 0.79 carat range is down about 12 percent, and 0.80 to 0.89 carat is down a similar amount, with both still drifting lower through mid-2026. Neither shows a clear turn yet. Part of this softness isn't new, either: demand for natural diamonds in the popular 0.5 to 1 carat "hero stone" range had already been cooling before our two-year IDEX window even starts, a longer structural shift that's separate from the lab-grown competition and dealer cash-flow pressures we cover elsewhere in this piece.

The 0.90 to 0.99 carat range tells a slightly different story. It's down too, but by less (around 6 percent), and it's held up better than its smaller neighbors. Our read: this is the "almost a carat" bracket, and a fair number of buyers who might have settled for 0.85 carats a few years back are sizing up to just under the 1.00 carat mark instead. It's a psychological threshold that's done a lot of work in this industry for a very long time, and it's still doing it.

If you're comparing how diamond grading actually works against carat weight trends, this is a useful place to slow down. A high clarity stone in a soft size range doesn't automatically mean a good deal. We'll get to that.

Why 2 to 3 Carat Stones Are the Exception

The 2.00 to 2.99 carat range crossed back above its July 2024 baseline in the spring of 2025, hitting about 100.6 on our index (where 100 is the July 2024 starting point) before easing to around 95 by mid-2026. That's a real, if temporary, recovery, and it lines up almost exactly with a supply problem on the mining side that we'll cover next.

Zoom out further, past 3 carats, and the pattern holds: the 4.00 to 4.99 carat range is the only weight class in our full two year comparison that shows a net positive average change. Individual stones in that range, at top color and clarity, are up 50 to 70 percent since 2024. That's not a typo. Big, clean, white diamonds are having a moment that smaller stones simply are not.

Here's the twist worth sitting with: within that recovery, the very top clarity grades (Internally Flawless, VVS1) have actually recovered the least. If you're chasing a big diamond right now, the "practically perfect" grades are commanding less of a premium over their slightly-included cousins than they used to. There's a real argument for buying a little further down the clarity scale and putting the savings toward size or cut quality instead. We happen to think cut is where the geek-out details actually pay off visually, but that's a different article.

Lab-Grown vs. Natural Diamond Prices in 2026

No conversation about carat weight trends is complete without lab-grown diamonds, because they're a big part of why natural diamond demand has shifted the way it has.

1 Carat Lab-Grown vs. Natural Diamond Price

At 1 carat, the gap between lab-grown and natural is wide and it's not closing. Lab-grown production costs keep dropping (CVD, the more common and less energy-intensive lab-grown method, has gotten a lot more efficient since the early days of lab-grown diamonds), while natural 1 carat stones are down roughly 5 to 9 percent since mid-2024 depending on color and clarity. The result is buyers doing quick mental math and, in a lot of cases, choosing to size up.

2 to 3 Carat Lab-Grown vs. Natural Diamond Price

This is where the size-up trend gets dramatic. Industry data from BriteCo shows the average lab-grown engagement ring center stone grew from 1.31 carats in 2019 to 2.45 carats in 2025. That's not a small shift, it's nearly double. Buyers comparing natural and lab-grown at the same budget are getting a genuinely different looking ring: BriteCo's research found natural buyers averaging $7,000 for a 1.6 carat stone, while lab-grown buyers spent about $4,300 for a 2.0 carat stone, with money left over.

Here's something we've noticed with our own clients: the soon-to-be-engageds who share their saved Instagram, Pinterest, and camera roll inspiration photos with us are showing us noticeably bigger center stones than they were even in 2023. It's a real, visible shift, not just an industry stat.

That said, we'd add a caveat that's specific to Alara. We sell a lot of very uniquely styled engagement rings where the design, the metalwork, or a non-diamond center stone does a lot to carry the overall impact, so the center diamond itself carries less of the "wow" than it does in a traditional solitaire. Because of that, we've likely felt the shrinking-demand-for-smaller-natural-stones trend less acutely than a shop built entirely around classic solitaires would. If your whole inventory is round brilliants in basket settings, this shift probably hits differently.

For what it's worth, natural diamond buyers aren't sitting still either. Industry tracking from the Natural Diamond Council shows average natural engagement ring total carat weight also rising, up 5 percent year over year in 2025, with the 1.00 to 1.04 carat bracket now the single largest size category by sales share. Whatever you decide between lab-grown and natural, sizing up seems to be the story on both sides of the aisle right now.

If you'd rather sidestep the size-versus-budget math entirely, a salt and pepper diamond is worth a look. Different aesthetic, different price structure, genuinely one of a kind by nature.

What's Actually Driving the Changes (Supply Side)

The 2.00 to 2.99 carat recovery isn't a fluke, and it isn't marketing spin. It traces back to a real supply problem at the mining level.

De Beers cut total rough diamond production by 22 percent in 2024, down to 24.7 million carats, and cut guidance again for 2025, later reducing it further mid-year. The cuts weren't spread evenly. Jwaneng, the mine that historically produces De Beers' higher value, larger rough diamonds, saw production fall 49 percent in 2024, down to just 1 million carats.

By the February 2025 sight (the industry term for De Beers' periodic rough diamond sales events), sightholders were openly reporting shortages of rough diamonds over 5 carats, even though De Beers was still sitting on close to $2 billion in inventory. That inventory was mostly smaller goods. The big rough simply wasn't there.

Trace the timeline and the pattern is clean: rough shortage reported in February 2025, polished 2.00 to 2.99 carat prices climbing from 98.4 in October 2024 to 100.6 by April 2025. A one to two quarter lag between a rough shortage and a polished price response is completely normal, given how long cutting, planning, and distribution actually take. What's used to cut a diamond matters here too. Larger rough takes longer and more expertise to plan around, which adds to the lag.

Worth addressing directly: the mid-2026 Strait of Hormuz disruptions aren't a factor here. Rough and polished diamonds move almost entirely by air freight, not sea lanes, so that chokepoint isn't part of this mechanism. That said, De Beers' own Q1 2026 production report explicitly cites "industry, geopolitical and tariff headwinds" among the reasons for continued weak trading, weighing on guidance and skewing the sales mix toward lower-value goods.

There's a second, less official piece of this story, and it's one we've seen up close. We know a small dealer, and several others with similar if less specific stories, where discounting on certain stones has nothing to do with what the diamond is "worth" and everything to do with cash flow. Ours put it bluntly: the twins' tuition was due. That's not a euphemism, that's the actual reason a specific parcel got priced to move. It sounds almost too candid to be a market force... but actually, it's a documented, recurring pattern in this industry. Banks pulled back credit to the diamond trade hard after 2008, and again after a 2015 debt crisis in the sector, which pushed a lot of midstream dealers to self-finance their own inventory. When cash gets tight, self-financed inventory is what moves first, price be damned. It's worth remembering the next time someone tells you a "deal" reflects the diamond's actual value rather than someone's current financial circumstances.

What This Means If You're Buying (or Selling) a Diamond Right Now

If you're buying, the 0.70 to 1.99 carat range is currently the buyer's market. Prices are down, and the decline has been slow and steady enough that there's no obvious sign of a rebound coming fast. If your heart is set on something in that window, and especially if you're flexible on the very top clarity grades, this is a reasonable window to move.

If you're set on 2 carats or larger, understand you're shopping in a segment with real supply pressure behind it. That doesn't mean don't buy, it means don't expect a discount to fall in your lap, and don't wait around for one. We'd also gently suggest not assuming bigger is automatically better for your particular design. A rose cut or a well-chosen fancy shape can visually punch above its actual carat weight, and a lot of our custom clients end up happier with a smaller, better-cut stone in the right setting than a bigger one that reads flat.

If lab-grown is on your radar because of the price gap, it's a legitimate option, not a lesser one, and we're happy to talk through the honest differences between it and natural without any sales pressure either direction. If ethical sourcing is part of your decision-making regardless of which you choose, that's worth understanding properly too, since "conflict-free" and "ethically sourced" are not the same claim, and the industry conflates them constantly.

What This Means If You Already Own Diamond Jewelry (Appraisals and Insurance)

Everything above matters even if you're not shopping for anything. If you own diamond jewelry that's insured, either through a rider on your homeowner's policy or a standalone jewelry policy, these price shifts affect what you're paying every year, whether you've thought about it or not.

Most insurance companies want an updated appraisal every three to five years, though the exact window depends entirely on the carrier. Here's the part that catches people off guard: if you don't provide an updated appraisal on that schedule, the insurer doesn't just leave your coverage alone. Instead, they typically do one of two things, and neither reflects what's actually happened in the market. Either they quietly let your coverage lapse behind current replacement cost, leaving you under-covered without realizing it. Or, more commonly, they apply an automatic value increase to everything on your policy after a set number of years, a flat inflation-style bump unrelated to actual movement in metal, labor, gemstone, or diamond pricing. Your premium goes up accordingly, based on an assumption, not a fact.

Given what we've just walked through, that assumption is now working against a lot of people who own natural diamonds in the 0.70 to 1.99 carat range. If your last appraisal was done in 2023 or early 2024 and hasn't been updated since, there's a real chance you're currently insuring, and paying premiums on, a value that's higher than what it would actually cost to replace that stone today. The same logic applies to lab-grown diamonds, arguably even more so. Lab-grown pricing has dropped substantially over the past three years as production has scaled, so an older appraisal on a lab-grown piece is especially likely to be inflated relative to current replacement cost.

There's a flip side worth naming directly, because we hear about it more than you'd think. If you've recently had a piece reappraised and the new number came in lower than you expected, possibly lower than what you paid or what a previous appraisal stated, that's not necessarily a red flag or an appraiser making an error. Given the actual price movement in the 0.70 to 1.99 carat range over the last two years, a lower current appraisal on a natural diamond in that size window is entirely consistent with the market, not a sign something went wrong.

The takeaway either way is the same: get an updated appraisal on a real schedule rather than waiting for your insurer's default timeline to force the issue, and when you do, check that your coverage matches it rather than assuming the policy adjusted itself correctly. A current, accurate appraisal is really the only way you'll know if you're under-covered, over-covered, or paying a fair premium for what your piece would actually cost to replace today.

Sources: IDEX Diamond Price Reports (monthly, July 2024 to July 2026); Mining Weekly, Modern Jeweler, Rapaport, Miningmx, and National Jeweler production reporting on De Beers and Anglo American; BriteCo, The Lab-Grown vs. Natural Diamond Report (2025); Natural Diamond Council / Tenoris, Natural Diamond Trends 2025; De Beers Diamond Insight Report / US Diamond Acquisition Study (Ipsos); Delagem Diamond Market Statistics 2024, citing Rapaport; Rapaport, Banking on Diamonds and The Next Diamond Decade; De Beers Q1 2026 production report.