By Ari Gold ยท October 15, 2026
What Lab-Grown Diamonds Actually Cost in 2026: We Analyzed 320,960 Real Stones
A 2 carat, D to F color, VS1 or better round lab-grown diamond now costs a median of about $1,060 at Icestore. A 3 carat with the same specs runs about $1,630, and a 5 carat about $2,185.
Those numbers come straight from our live inventory: 320,960 certified lab-grown diamonds, all 1.5 carats and up, all D to G color and VS1 clarity or better, priced exactly as they appear on icestore.com in October 2026. Instead of quoting a vague "lab-grown diamonds cost 70% less" figure, we ran the numbers to show what you will actually pay, where your money goes, and where buyers overspend.
Five findings stood out:
- Size is cheap. Price per carat stays roughly flat, around $450 to $550, from 1.5 to 10 carats. Doubling the size roughly doubles the price, nothing more.
- Flawless is expensive. At 2 carats, a D Flawless round costs about three times a D VS1, for a difference no one can see.
- VS1 and VVS2 cost almost the same. The gap is usually only a few percent, and rarely more than 13%.
- Ovals carry a premium. A 2 carat oval costs about 34% more than a comparable round.
- The grading lab matters more than the grades. GIA-graded stones cost roughly twice as much as IGI-graded stones with identical specs.
Lab-grown diamond prices by carat
For round lab-grown diamonds, price per carat holds between about $450 and $550 all the way from 1.5 to just under 10 carats. That is the single biggest difference from natural diamonds, where price per carat climbs steeply as stones get bigger.
| Carat weight | Round: median price | Round: typical range (middle 50%) | All shapes: median price | Round: median price per carat |
|---|---|---|---|---|
| 1.50 to 1.99 | $769 | $715 to $875 | $808 | $482 |
| 2.00 to 2.49 | $1,073 | $991 to $1,263 | $1,170 | $512 |
| 2.50 to 2.99 | $1,305 | $1,142 to $1,472 | $1,377 | $489 |
| 3.00 to 3.49 | $1,684 | $1,475 to $2,100 | $1,945 | $543 |
| 3.50 to 3.99 | $1,832 | $1,681 to $1,930 | $1,966 | $513 |
| 4.00 to 4.99 | $2,058 | $1,918 to $2,286 | $2,271 | $485 |
| 5.00 to 5.99 | $2,387 | $2,078 to $2,915 | $2,674 | $451 |
| 6.00 to 7.99 | $3,170 | $2,749 to $3,544 | $3,283 | $469 |
| 8.00 to 9.99 | $4,019 | $3,650 to $4,706 | $3,963 | $474 |
| 10.00 and up | $8,864 | $6,535 to $12,805 | $6,376 | $853 |
The pattern breaks only above 10 carats, where large rounds become genuinely scarce and price per carat jumps to roughly $850.
The "magic size" premium: buy just under the round number
Prices jump the moment a diamond crosses a round-number weight like 2.00, 2.50 or 3.00 carats, even though the size difference is invisible. In our round inventory, the jump at 3 carats is the biggest.
| Round diamonds | Median price | What you save buying just under |
|---|---|---|
| 1.95 to 1.99 ct | $950 | |
| 2.00 to 2.04 ct | $1,080 | about 12% |
| 2.45 to 2.49 ct | $1,133 | |
| 2.50 to 2.54 ct | $1,311 | about 14% |
| 2.85 to 2.89 ct | $1,249 | |
| 3.00 to 3.04 ct | $1,651 | about 24% |
A 2.85 carat diamond is only about 1.7% narrower across the top than a 3.00 carat, yet it costs roughly $400 less at the median. One more quirk: stones just above a magic number can be cheaper than stones right on it. Rounds weighing 2.10 to 2.19 carats had a lower median price ($1,002 to $1,023) than 2.00 to 2.04 carat rounds ($1,080), because sellers price the "2 carat" label itself.
Color and clarity: where the money really goes
The top clarity grades are where prices explode; everything from VS1 to VVS2 sits in a tight, affordable band. These grids show median prices for IGI-graded round diamonds with Ideal or Excellent cut, so shape, lab and cut are held steady.
2.00 to 2.09 carat rounds
| Color | FL | IF | VVS1 | VVS2 | VS1 |
|---|---|---|---|---|---|
| D | $3,056 | $1,798 | $1,423 | $1,150 | $1,019 |
| E | $2,494 | $1,588 | $1,141 | $1,001 | $980 |
| F | $1,974 | $1,452 | $1,084 | $980 | $950 |
| G | $1,377 | $898 | $923 | $896 |
3.00 to 3.09 carat rounds
| Color | FL | IF | VVS1 | VVS2 | VS1 |
|---|---|---|---|---|---|
| D | $4,365 | $2,703 | $2,258 | $2,141 | $1,927 |
| E | $3,958 | $2,251 | $1,859 | $1,596 | $1,475 |
| F | $3,510 | $2,119 | $1,738 | $1,566 | $1,394 |
| G | $2,167 | $1,483 | $1,265 | $1,277 |
What the grids tell you:
- Flawless (FL) is the most expensive word in diamonds. A 2 carat D FL costs about three times a D VS1. Both look identical to the naked eye.
- VS1 versus VVS2 barely matters on price. At 2 carats the gap is $130 or less, and often under $30. At 3 carats it is about $120 to $210, and for G color the VS1 is actually the same price.
- D color carries a real premium at 3 carats. A 3 carat D VS1 runs about $450 more than an E VS1, roughly 30%, for a difference most people cannot see once the stone is set.
- The sweet spot is E or F color, VS1 or VVS2 clarity. You get a stone that faces up colorless and eye-clean, at the low end of the price range.
Does shape change the price?
Yes: ovals and marquises cost about 20% to 34% more than rounds of the same weight and grade, while emerald, princess and Asscher cuts cost about the same as rounds. Medians below are for IGI-graded D to F color, VS1 or VVS2 diamonds.
| Shape | 2.00 to 2.19 ct median | vs. round | 3.00 to 3.19 ct median | vs. round |
|---|---|---|---|---|
| Round | $1,013 | $1,578 | ||
| Emerald | $1,022 | +1% | $1,607 | +2% |
| Princess | $1,031 | +2% | $1,522 | -4% |
| Asscher | $1,072 | +6% | $1,700 | +8% |
| Heart | $1,129 | +11% | $1,819 | +15% |
| Cushion | $1,150 | +14% | $1,763 | +12% |
| Radiant | $1,154 | +14% | $1,794 | +14% |
| Pear | $1,211 | +20% | $1,652 | +5% |
| Marquise | $1,343 | +33% | $1,926 | +22% |
| Oval | $1,356 | +34% | $1,880 | +19% |
This is the reverse of natural diamonds, where rounds usually cost the most. The lab-grown premium likely reflects demand, since ovals are one of the most requested engagement ring shapes right now. The upside: elongated shapes like ovals, pears and marquises tend to look larger than a round of the same carat weight, so part of that premium buys visible size.
Certificate, growth method and cut: what is worth paying for
The grading lab on the certificate moves price more than any grade does. For 2.00 to 2.19 carat round diamonds, D to F color, VS1 or VVS2:
| Factor | Option | Median price | Difference |
|---|---|---|---|
| Grading lab | IGI | $1,013 | |
| GIA | $2,079 | about 2x | |
| Growth method (IGI) | CVD | $1,009 | |
| HPHT | $1,117 | +11% | |
| Cut grade, round (IGI) | Ideal | $1,013 | |
| Excellent | $1,014 | none |
- GIA vs. IGI. GIA-graded lab-grown diamonds cost roughly twice as much as IGI-graded stones with the same color and clarity, and the gap holds at every grade we checked. Most of that is scarcity: only about 4% of our lab-grown inventory carries a GIA report. Both are respected labs. If you value the GIA name, know what it costs; if not, IGI is where the value is.
- CVD vs. HPHT. These are the two ways lab diamonds are grown. HPHT stones ran about 11% higher at this size, partly because they are less common (about 19% of inventory). Both produce real diamonds, chemically identical to mined ones, and the method is not visible in the finished stone.
- Ideal vs. Excellent cut. For rounds, IGI's Ideal and Excellent grades sell for the same median price, so there is no reason to compromise on cut.
What your budget buys
A $2,000 budget now reaches a 3.5 carat round with top-tier color and clarity. This table covers IGI-graded rounds with D to F color, VS1 to VVS1 clarity and Ideal or Excellent cut.
| Diamond budget | Stones available | Comfortable size (90% of options are this size or smaller) | Largest available |
|---|---|---|---|
| $1,000 | 34,142 | 2.06 ct | 2.69 ct |
| $1,500 | 65,327 | 2.72 ct | 3.97 ct |
| $2,000 | 84,003 | 3.55 ct | 5.28 ct |
| $3,000 | 96,936 | 4.51 ct | 7.50 ct |
| $5,000 | 101,913 | 5.00 ct | 10.26 ct |
And the entry price for each headline size, same specs (stones weighing 2.00 to 2.09 carats, 3.00 to 3.09, and so on):
| Size | Lowest price | Median price |
|---|---|---|
| 2 carat | $848 | $1,060 |
| 3 carat | $1,239 | $1,629 |
| 4 carat | $1,620 | $1,994 |
| 5 carat | $1,894 | $2,185 |
Because the diamond itself costs so little, many buyers now put more of their budget into the setting, a better metal, or simply a bigger stone.
How to use this when you shop
Put your money into size and cut, and skip the grades you cannot see. Based on the numbers above:
- Choose E or F color. They face up colorless, and D adds up to 30% at 3 carats.
- Choose VS1 or VVS2 clarity. Both are eye-clean, and FL can triple the price.
- Insist on an Ideal or Excellent cut. It costs nothing extra and drives sparkle.
- Shop just under round weights. A 2.85 carat instead of a 3.00 can save around a quarter of the price.
- Decide whether the GIA name is worth double. An IGI report covers the same grades for about half.
- Compare shapes by look, not just carat. An oval costs more per carat but can look larger than a round.
Ready to browse? Start with our 2 carat lab-grown diamonds, 3 carat lab-grown diamonds, oval lab-grown diamonds or E color lab-grown diamonds, or explore all lab-grown diamonds at Icestore.
How we did this
We analyzed every lab-grown diamond in Icestore's live inventory in October 2026: 320,960 loose stones, all in stock and certified (306,782 by IGI, 14,178 by GIA). Prices are the retail prices shown on icestore.com, not wholesale costs.
Our inventory covers diamonds 1.50 carats and larger, D to G color, and VS1 clarity or better, so these figures do not cover smaller stones or lower grades. We report medians (the middle price) rather than averages, so a handful of unusual stones cannot skew the results. Comparisons of color, clarity, shape, lab, growth method and cut hold the other factors steady wherever possible. We plan to refresh these numbers every quarter.
Frequently asked questions
How much does a 2 carat lab-grown diamond cost? In October 2026, a 2 carat round lab-grown diamond with D to F color and VS1 or better clarity had a median price of about $1,060 at Icestore, with the lowest-priced stones starting around $850. Browse 2 carat lab-grown diamonds.
How much does a 3 carat lab-grown diamond cost? A 3 carat round with D to F color and VS1 or better clarity had a median price of about $1,630, starting around $1,240. Browse 3 carat lab-grown diamonds.
Do lab-grown diamonds get more expensive per carat as they get bigger? Barely. Round lab-grown diamonds held a median of about $450 to $550 per carat from 1.5 carats up to just under 10 carats.
Is a GIA certificate worth it for a lab-grown diamond? GIA-graded lab-grown diamonds cost about twice as much as IGI-graded stones with the same grades. Both labs are respected, so the choice comes down to whether the GIA name is worth the premium to you.
What is the best color and clarity for a lab-grown diamond? For most buyers, E or F color with VS1 or VVS2 clarity gives a colorless, eye-clean diamond at the lower end of the price range. Flawless stones can cost about three times as much with no visible difference.
Why are oval lab-grown diamonds more expensive than round? At 2 carats, ovals had a median price about 34% higher than comparable rounds, likely reflecting strong demand. Ovals also tend to look larger than rounds of the same weight.