Lab-Grown vs Natural at 1.5 Carats, the F VS2 Cushion

A natural 1.5 to 2ct F VS2 cushion has a median price of $9,095 across the listings we tracked in November 2026, and the lab-grown version of the exact same specification sits at $738. Same shape. Same colour. Same clarity. The lab stone comes in 92% cheaper, a ratio of 12.3 to 1, which runs wider than the headline spread in our broader comparison of lab-grown and natural diamond prices.

That piece covers why the two markets split. This one stays narrow: one shape, one size band, one grade, and what the gap means for someone standing at the counter with a real budget. All figures are USD, taken from current listings on the day of writing, using the best available price for each stone across the retailers we track.

Twelve to one, in real money

Ratios are tidy. Dollars are what sting.

At the median, the natural F VS2 cushion costs $8,357 more than its lab-grown twin. That isn't a rounding error on an engagement ring. For most couples it's the honeymoon, or a respectable slice of a house deposit, and it's the single biggest decision in the whole purchase, bigger than colour, clarity or cut combined.

Per carat, natural lands at a median of $5,773 against $456 for lab-grown. Those per carat figures matter because the 1.5 to 2ct band is wide; a 1.95ct stone and a 1.51ct stone are both in here, and the per carat number strips some of that size noise out. The ratio holds either way.

Measure	Lab-grown	Natural
Stones listed	1,329	954
P10	$349	$5,556
Median	$738	$9,095
P90	$1,383	$14,790
Median USD per carat	$456	$5,773
Listed at two or more retailers	23%	30%
Certified	32%	35%

Our honest read on the lab side: at $738, the centre stone stops being the main cost of the ring. A well-made platinum setting with a hidden halo can easily cost more than the diamond sitting in it. That flips the whole conversation. Budget goes to the mount, the band, the craftsmanship.

On the natural side it's the reverse. At $9,095 the stone is the purchase and everything else is accessories. Two completely different shopping exercises that happen to share a grading report format.

The bands never meet

Medians tell half the story. The edges of each band tell the rest.

Point in band	Lab-grown	Natural	Dollar gap	Natural as a multiple
P10	$349	$5,556	$5,207	15.9x
Median	$738	$9,095	$8,357	12.3x
P90	$1,383	$14,790	$13,407	10.7x

The top tenth of lab-grown F VS2 cushions starts at $1,383. The cheapest tenth of naturals tops out at $5,556. Between those two numbers there's a $4,173 hole where, statistically, almost nothing lives. Pay $1,383 and it's an expensive lab stone. Pay $5,556 and it's a bargain natural. No overlap at all.

So the familiar dilemma of a nice lab stone versus a cheap natural one simply doesn't exist at this spec. Nobody is trading up a few hundred dollars to cross over. The choice is between origins, full stop, and the price follows from that choice rather than the other way around.

And look at the spread inside each band. Lab-grown P90 is roughly four times its P10. Natural P90 is about 2.7 times its P10. Same grade on both sides, yet lab pricing is proportionally the looser of the two.

Some of that lab spread is legitimate. Carat weight varies across the band, and cushions vary more in cut quality than almost any other shape (more on that below). But plenty of it is plain retailer margin on what has become a commodity. A lab-grown F VS2 cushion at $1,383 isn't four times the stone of one at $349. Paying the top of the lab band for a familiar brand name is the most common way we see buyers overspend in lab-grown right now.

Natural's tighter spread tells the opposite story. Natural pricing still leans on trade price lists and wholesale benchmarks, which leaves less room for wild swings between sellers on the same grade. Less room, though, isn't no room.

What the natural premium buys

Strip out the marketing and the natural premium at this spec buys three things: rarity, a resale floor, and a slightly better chance of a verified report. Each deserves a hard look.

Rarity. Not shopping scarcity. We count 954 natural F VS2 cushions in this band against 1,329 lab-grown, so there's plenty of choice on both sides. The scarcity is geological; the stone formed underground over a very long time and there's a finite supply of it. If that origin story matters to the person wearing it, the premium is paying for something real. If it doesn't, $8,357 is a lot of money for a feeling.

Resale. Natural diamonds resell well below retail, typically for a fraction of the original price, but there's an established secondary market and a floor. Lab-grown resale is thin to non-existent, and with production still scaling up we wouldn't count on that changing. Neither origin is an investment. Natural at least won't be close to worthless.

Certification. In our data, 35% of natural listings at this spec are flagged as certified, against 32% of lab-grown. Low on both sides. Roughly two in three listings don't carry a grading report we can match to the stone.

At $738, an uncertified lab stone is a modest risk. At $9,095, buying an uncertified natural is a gamble we'd never take. For natural at this price, insist on a GIA report. For lab-grown, both IGI and GIA grade lab stones; this data block doesn't break out the lab mix, so check the report itself and verify the number on the grading lab's own site before any money changes hands. An F VS2 from one lab isn't always an F VS2 from another, and the difference shows up most in colour.

Same stone, several price tags

This is the column most buyers skip and shouldn't. At this spec, 30% of natural cushions appear at two or more retailers, against 23% of lab-grown.

That duplication comes from shared inventory feeds. One physical diamond sits in a supplier's vault and gets listed by several online jewellers, each adding their own margin. Same stone, same certificate, different price.

Our figures already use the best available price per stone, which means the medians above assume a buyer found the cheapest listing. A quote from a single store may well sit above them. On a natural stone near $9,095, even a modest percentage difference between retailers adds up to hundreds of dollars, which is why cross-retailer comparison earns its keep on the natural side more than anywhere else.

Lab-grown is different. With 77% of lab F VS2 cushions listed at only one retailer, matching the exact same stone across shops usually isn't possible. Compare specs instead. The lab-grown 1.5ct F VS2 cushion price page shows where any quote sits in the band, and the natural 1.5ct F VS2 cushion price page does the same for mined stones.

A simple rule from the numbers. A lab-grown quote above $1,383 is above the 90th percentile; push back or walk. A natural quote above $14,790 needs a reason, such as weight near the top of the band or genuinely exceptional cutting. Plain markup isn't a reason.

One grade down on each side

Here the two origins want completely opposite strategies.

On natural, stepping down is the classic value play, and at this price it's where real money hides. The two obvious moves are F to G, or VS2 to SI1. For cushions specifically, we'd drop colour first.

Cushions tend to show body colour a touch more than rounds, especially elongated ones, but a G still faces up white in platinum or white gold, and in yellow or rose gold the step is invisible. Clarity is trickier. A cushion modified brilliant with that busy crushed ice pattern hides inclusions beautifully. An antique style cushion with broad, open facets shows them far more readily. SI1 in a cushion is a call made stone by stone, with video, never from the certificate alone. The full colour and clarity grid sits on the natural 1.5ct cushion page; we're not quoting those cells here because this post sticks to the F VS2 data.

On lab-grown, stepping down barely saves anything in absolute dollars. The entire P10 to P90 band spans just $1,034. Shaving a grade off a $738 stone buys lunch, not a better ring.

So flip it. On lab, step up. Spend on cut quality, which is the variable that makes or breaks a cushion's sparkle. Spend on weight toward the upper end of the band. Consider D or E colour, or a higher clarity, if the price difference is small. The lab-grown 1.5ct cushion grid shows what those upgrades cost. Our view is firm: at this size, there's very little reason to buy a lab-grown cushion below F VS2. The savings simply aren't there.

Where we'd put the money

Pick the origin for a reason, then shop the band hard.

For natural, aim for the lower half: $5,556 to $9,095 buys a perfectly good F VS2 cushion, and the money above that should be paying for cut or carat weight, not a retailer's showroom. Insist on a GIA report. Check whether the stone appears elsewhere, since nearly a third of them do. And consider G before going near SI1.

For lab-grown, aim near the $738 median and refuse to pay much past it without a clear reason. Put the $8,357 the lab stone saves into the setting, a better band, or the bank. Verify the report number with the grading lab directly.

What we're watching next: whether the lab-grown top decile compresses toward the median as more retailers chase the same buyers, and whether natural's P10 holds at $5,556 or starts to soften. Either move would change the advice.

For now, the number to remember is $4,173, the empty space between the top of the lab band and the floor of the natural one.