Cushion Cuts Are in Freefall and Nobody's Talking About It

Natural diamonds dropped an average of 7.8% across all categories this week, marking the sharpest weekly correction we've tracked in months. Lab-grown prices, meanwhile, ticked up 2.4%. For anyone who's been watching and waiting, several genuine value opportunities have opened up simultaneously, and a few of them are already starting to close.

Two markets, opposite directions

Natural diamonds are correcting. Across 9 million listings and more than 6,200 categories, the average price fell 7.8% over the past seven days and 6.4% over the past thirty. That's sustained downward pressure, not a blip.

Lab-grown diamonds tell the opposite story. Prices rose 2.4% this week, though they're still down 3.7% on the month. With 18 million listings on the market (roughly double the natural supply), lab-grown sellers are competing fiercely on price, and that ongoing competition has kept prices low even as this week's number ticks upward.

For buyers, the calculus is straightforward. Natural diamonds are on sale. Lab-grown diamonds are cheap but stable. And the gap between them, while still enormous, narrowed slightly this week. Whether that narrowing continues depends largely on how long the natural correction lasts.

The shapes where comparison shopping saves thousands

Some diamond categories are priced consistently across retailers. Others aren't even close. The widest cross-retailer spreads right now are staggering, with some categories showing more than 100% variation between the cheapest and most expensive comparable stones.

Origin	Shape	Avg Savings	Avg Retailer Spread
Lab-grown	Pear	42.5%	107.1%
Natural	Oval	43.6%	78.5%
Natural	Pear	40.5%	73.2%
Lab-grown	Round	63.3%	72.1%
Lab-grown	Oval	38.2%	71.7%
Natural	Round	52.5%	67.2%

Lab-grown pear shapes have the widest spread of any category we track. A 107% spread means if one retailer lists a lab-grown pear at $1,000, a comparable stone at another retailer could cost under $500. The average buyer who compares across retailers saves 42.5% on lab-grown pears. That's not a rounding error. That's the difference between a 1ct and a 1.5ct stone for the same money.

Lab-grown rounds also deserve attention. The average comparison shopper saves 63.3% on a lab-grown round, the highest savings percentage in the table. Given that lab-grown rounds command the highest average price of any lab-grown shape ($2,160), the absolute dollar savings are substantial.

Natural ovals reward comparison shopping too. A spread of 78.5% and average savings of 43.6% means checking a second or third retailer on a 2ct natural oval can easily save $3,000 to $5,000. You can compare prices across all of these categories using our advanced search.

Cushion cuts are in freefall

This is the trend I'd call most significant right now. Every single market signal we're tracking for natural cushion cuts points down. Not most of them. All five.

Cushion Category	Monthly Decline	Active Listings
2.00 to 2.49ct, D to E colour	50.1%	58
1.50 to 1.99ct, F to G colour	34.2%	96
0.75 to 0.99ct, J to K colour	17.5%	69
2.00 to 2.49ct, J to K colour	11.7%	43
1.00 to 1.24ct, J to K colour	11.5%	89

The 2.00 to 2.49ct range in D to E colour is declining at 50.1% per month. That's the premium end of the cushion market falling fast. If you've wanted a larger cushion in the top colour range, the next few weeks could offer the best pricing we've seen.

More telling is the 1.50 to 1.99ct F to G range, down 34.2% monthly. This is the sweet spot for engagement ring buyers: big enough to look impressive, colour that faces up white, and now priced significantly below where it sat a month ago. With 96 active listings, there's genuine selection to work with.

Even the lower colour grades are sliding. J to K colour cushions are declining across the 0.75 to 0.99ct, 1.00 to 1.24ct, and 2.00 to 2.49ct ranges simultaneously. That's not a correction in one segment. The entire natural cushion market is under pressure. If you're flexible on shape and want maximum value on a natural diamond, cushion cuts deserve a serious look right now.

The biggest drops this week

Beyond the cushion trend, several categories posted dramatic week over week declines. Some sit in lower quality tiers, but a few land in ranges that matter to real buyers.

Category	7 Day Change	30 Day Change
Natural round 0.30 to 0.49ct, N+, I clarity	down 82.6%	down 30.9%
Lab-grown round 3.00 to 3.99ct, J to K, I clarity	down 50.1%	down 12.5%
Natural pear 2.50 to 2.99ct, F to G, I clarity	down 48.7%	down 49.4%
Natural heart 2.00 to 2.49ct, H to I, I clarity	down 48.0%	down 3.6%
Natural cushion 0.30 to 0.49ct, F to G, I clarity	down 46.0%	down 47.2%

That natural pear category catches my eye. A 2.50 to 2.99ct pear in F to G colour has dropped nearly 49% over the past month and almost as much again this week. These stones were sitting around $4,992 per carat and are now roughly half that. If you can work with I clarity (and many of these stones will be eye-clean at that size, especially in a pear shape that hides inclusions well), this is a genuinely strong buy.

The 3ct+ lab-grown round in J to K colour is worth watching too. Down 50% in a week, these stones now sit around $3,500. The lab-grown 3ct+ segment has been under relentless pricing pressure all year. Sellers are desperate to move inventory, and buyers are the beneficiaries.

85% off and chemically identical

The price gap between lab-grown and natural varies significantly by shape, and the differences are worth understanding if you're open to either origin.

Marquise leads the pack. A lab-grown marquise costs 85.6% less than its natural equivalent on average. Natural marquise diamonds across our listings average $8,087. The lab-grown equivalent averages $1,168. That's a $6,919 gap for a stone that is chemically, optically, and physically identical. No gemologist can tell them apart without specialised equipment.

Cushion, emerald, radiant, and pear shapes all cluster in the 81 to 82% discount range. If you want a fancy shape in lab-grown, you're paying roughly 18 to 19 cents on the dollar compared to natural. Ovals sit slightly lower at 79.9%, making them the "smallest" lab-grown discount among fancy shapes, though calling a 79.9% discount small feels absurd.

Round and princess cuts have the narrowest gaps, at 74.6% and 72.2% respectively. Rounds are still the most popular shape by far, and even in lab-grown they command a premium ($2,160 average) because demand never lets up. But 74.6% off is still 74.6% off. For budget-conscious buyers, lab-grown marquise diamonds remain the single best value proposition in the entire market.

Supply is surging at the worst time for sellers

New inventory is flooding into several key categories this week, which typically puts additional downward pressure on prices over the following fortnight.

Lab-grown rounds in the 0.30 to 0.49ct range saw a 783% supply increase. That's an enormous influx, and it explains why smaller lab-grown rounds remain so accessible. Natural round 1.00 to 1.24ct diamonds jumped 339% in supply, with 35 new listings arriving in just seven days. If you're shopping for a 1ct natural round, the increased competition among sellers makes this a solid window.

The 2.00 to 2.49ct natural round segment also surged 218%, with 12 new listings. Larger natural rounds rarely see supply increases this significant. When they do, prices tend to soften over the following two to three weeks as sellers compete for attention. Buyers who can wait a week or two may benefit from watching this category settle.

What I'm watching next

The cushion correction is the story. Five categories all trending down with maximum trend strength doesn't happen often in a single shape. If you're in the market for a natural cushion, I'd shop now rather than wait, because sustained declines like this can reverse quickly once inventory clears and bargain hunters sweep up the best stones.

I'm also keeping an eye on the lab-grown pear spread. A 107% retailer variation tells me that market hasn't found equilibrium yet. Cross-retailer comparison tools are more valuable in volatile categories than in stable ones, and lab-grown pears are anything but stable right now.

Natural diamond prices overall are down almost 8% this week. That's a meaningful correction, not a fire sale, but real enough to act on. And with supply increasing across the most popular natural categories, I expect the pressure to continue into late June. If you've had a specific stone or category on your watchlist, now's the time to check whether it's moved. Most have.