Lab-Grown Diamond Price Per Carat in 2026: $2,015
Use BriteCo appraisal data to compare a lab-grown diamond’s past estimated sales value with its 2026 replacement benchmark for today’s market.
The broad lab-grown diamond price benchmark for the first half of 2026 is $2,015 per carat. That is BriteCo’s median estimated sales price per carat for lab-grown engagement-ring diamonds in its appraisal records—not a universal retail price for every loose stone or finished ring.
For an older lab-grown diamond, multiply its carat weight by $2,015 to estimate a current value on the same benchmark. A 1-carat stone associated with the 2019 median of $4,622 would produce a 2026 benchmark of $2,015, a drop of about 56%. This comparison can identify a stale insurance or replacement figure, but it cannot appraise a specific diamond without its grades, measurements, setting and current comparable sales.
Enter the carat weight and appraisal or purchase year to compare its old benchmark with 2026.
Lab-Grown Diamond Value Time Machine
Results use annual BriteCo median estimated sales prices per carat, not a quote for a specific diamond.
Benchmark gap: $2,607 lower, a 56% drop.
The original benchmark budget buys approximately 2.29 carats at the 2026 median.
An insurance value based on the older rate may now be high relative to BriteCo’s median. This does not prove the original appraisal was wrong.
Source: BriteCo Jewelry, Diamond, & Watch Price Index; full-year medians for 2019–2025 and January–June for 2026.
The $2,015 Figure Is a Dataset Median
BriteCo reports these median estimated sales prices per carat for lab-grown engagement-ring diamonds:
| Year | Median Price Per Carat |
|---|---|
| 2019 | $4,622 |
| 2020 | $4,321 |
| 2021 | $4,194 |
| 2022 | $3,895 |
| 2023 | $3,130 |
| 2024 | $2,630 |
| 2025 | $2,057 |
| 2026, January–June | $2,015 |
The first-half 2026 figure is about 56% below 2019. It is only about 2% below the 2025 median, although a half-year result does not establish that prices have stopped falling. The figures and methodology appear in the BriteCo Jewelry, Diamond, & Watch Price Index.
The dataset covers jewelry appraisals created with BriteCo’s tools. Its sales-price figures are estimates derived from recorded sales matched by year, category and diamond origin. It is not a census of every U.S. diamond transaction, and it does not establish the correct price for an individual stone.
That distinction also applies to the widely reported 51% figure. Lab-grown diamonds represented 51% of newly appraised engagement rings in BriteCo’s records during the first half of 2026, up from 6% in 2019, according to BriteCo’s release. Trade publication The Centurion cautioned that this appraisal share should not be read as national market share in its September 2026 coverage.
An Older Appraisal Can Be Stale Without Being Wrong
A past appraisal records a value reached at a particular time under particular market conditions. The decline in BriteCo’s medians means that an older lab-grown value may now be high relative to the current benchmark even if it was reasonable when prepared.
For a benchmark comparison, use two calculations:
Historical benchmark = carat weight × the median price per carat for that year.
First-half 2026 benchmark = carat weight × $2,015.
The difference shows how much the dataset’s median has moved. It does not show what a jeweler would charge to recreate the exact ring. A replacement quote may also include the setting, accent diamonds, metal, labor, taxes and seller services. An insurance limit can likewise differ from a likely resale price or a competitive loose-stone price.
If an older appraisal is being used to set coverage, the useful next step is not to replace its figure automatically with the calculator’s result. Ask for a current appraisal or replacement quote based on the same diamond specifications and ring design. The benchmark tells you whether a review is warranted; it does not determine the final insured value.
Equal Dollars Buy More Carat Weight in 2026
The same data can be read as purchasing power. At the 2019 median, $4,622 corresponded to 1 carat. At the first-half 2026 median of $2,015 per carat, that same amount corresponds to approximately 2.29 carats.
That does not mean a particular 2.29-carat diamond will sell for exactly $4,622. Price does not scale evenly across weights, grades, shapes and sellers. It shows what happened when one fixed budget is divided by BriteCo’s changing annual median.
The relatively small difference between the 2025 and first-half 2026 medians also matters. A buyer comparing those two periods sees much less change than someone comparing 2019 with 2026. Purchase year therefore changes the result substantially.
Loose-Stone Asking Prices Can Be Much Lower
The $2,015 benchmark describes the middle of a particular engagement-ring appraisal dataset. It does not indicate the lowest competitive online price for a loose lab-grown diamond.
Our August 2026 snapshot of 2-carat lab-grown diamonds found a practical advertised-price range of roughly $900–$1,400 for many loose stones. Dividing by two gives approximately $450–$700 per carat.
A separate 4-carat lab-grown price comparison placed a practical starting budget around $1,500–$3,100, or approximately $375–$775 per carat.
Those are dated online asking-price ranges, not completed-sale averages. They span different shapes and grades. They do not replace BriteCo’s benchmark, but they demonstrate why that benchmark should not be multiplied by carat weight to set a loose-stone shopping budget.
A 2-carat diamond therefore does not automatically cost $4,030, and a 3-carat diamond does not automatically cost $6,045. The multiplication is useful for comparing BriteCo’s annual medians, not for declaring a fair retail price.
Carat Brackets Do Not Share One Rate
BriteCo’s 2025 weight-bracket data showed lower median lab-grown prices per carat in the larger brackets it reported:
| Center-Stone Weight | 2025 Median Per Carat |
|---|---|
| 0.50–1.00 ct | $3,099 |
| 1.00–1.50 ct | $2,402 |
| 2.00–2.50 ct | $2,026 |
These figures come from the same BriteCo index. They are not prices for matched-grade loose diamonds, so they do not isolate carat weight as the cause of the difference. They do show why one blended rate is a poor calculator for an individual purchase.
The broader market was still moving in 2026. Industry analyst Edahn Golan reported that wholesale lab-grown prices fell an average of 13% year over year in the second quarter. The change varied by category: 2-carat stones fell 20%, while 1-carat rounds rose 1%.
His index reflects small-volume cash transactions in Mumbai and Surat for IGI-certified goods and excludes shipping, insurance and import duties. It is a wholesale trend indicator, not a U.S. retail quote or a direct substitute for BriteCo’s appraisal-derived data (Q2 2026 analysis).
Match the Stone Before Comparing Price
A useful price comparison holds the product and specifications as constant as possible:
| Match | Check |
|---|---|
| Product | Loose stone against loose stone, not against a finished ring |
| Weight | The same narrow range, such as 2.00–2.09 carats |
| Grades | Shape, color, clarity and applicable cut grade |
| Report | Grading laboratory, report type and treatment disclosures |
| Appearance | Face-up dimensions, proportions and video or inspection |
| Terms | Returns, warranty, shipping and mounting charges |
A higher color or clarity grade can raise the price without producing a visible improvement. Our guide to whether lab-grown diamond grades matter explains why an eye-clean VS stone may be a better use of the budget than a D/VVS upgrade purchased mainly for the report.
Keep the setting separate when possible. A finished-ring price can include metal, labor, accent diamonds, resizing and seller services. Confirm whether an advertised carat figure describes the center stone or total carat weight.
For matched loose stones, calculate each effective rate as loose-stone price ÷ exact carat weight = price per carat. That calculation can expose an expensive outlier, but the report, dimensions and visible performance determine whether the price difference is justified.