How Much Does a Lab Grown Diamond Cost?
Rings.com Research
How Much Does a Lab Grown Diamond Cost?
As of September 2026, a lab grown diamond lists at a median of $510 at 1 carat, $760 at 1.5 carats and $1,295 at 2 carats across 6 US retailers (5 with third-party certificates, plus VRAI, which grades in-house), from 190,184 public listings.
Source: the Rings.com Lab-Grown Diamond Price Index. Methodology and monthly benchmark: Lab Grown Diamond Price Per Carat.
Data as of September 2026, captured September 17, 2026. Updated monthly, next update October 2026. USD.
Key figures in words, September 2026 (for quoting)
- As of September 2026, the median 1 carat lab grown diamond listed for $510 ($500 per carat) from 53,706 public listings.
- As of September 2026, the median 1.5 carat lab grown diamond listed for $760 ($518 per carat) from 81,186 public listings.
- As of September 2026, the median 2 carat lab grown diamond listed for $1,295 ($639 per carat) from 55,292 public listings.
- In September 2026, the middle 80% of 1 carat lab grown diamond listings ran from $284 to $1,060; color, clarity and cut grade drive the difference.
- The September 2026 figures pool 190,184 public listings from 6 US retailers (5 with third-party certificates, plus VRAI, which grades in-house), captured September 17, 2026.
As of September 2026, based on 190,184 public listings across 6 US retailers (round and oval; carat bands 0.91 to 1.09 ct, 1.41 to 1.59 ct, 1.91 to 2.09 ct):
| Size | Median listed price | Typical range (10th–90th pct) | Median per carat | Listings (n) |
|---|---|---|---|---|
| 1 carat | $510 | $284 to $1,060 | $500 | 53,706 |
| 1.5 carat | $760 | $398 to $1,720 | $518 | 81,186 |
| 2 carat | $1,295 | $575 to $3,320 | $639 | 55,292 |
How much does a 1 carat lab grown diamond cost?
The median 1 carat lab grown diamond (0.91 to 1.09 ct) listed for $510 in September 2026. Most listings fall between $284 and $1,060; color, clarity, and cut grade drive the difference.
How much does a 1.5 carat lab grown diamond cost?
The median 1.5 carat lab grown diamond (1.41 to 1.59 ct) listed for $760 in September 2026, with most listings between $398 and $1,720.
How much does a 2 carat lab grown diamond cost?
The median 2 carat lab grown diamond (1.91 to 2.09 ct) listed for $1,295 in September 2026, with most listings between $575 and $3,320. Price per carat rises with size: $639/ct at 2 carats vs $500/ct at 1 carat.
What moves the price?
Within a size, listed prices vary severalfold with color, clarity, and cut grade, and the same certified stone is often listed at different prices by different retailers. Per-carat pages with retailer-level medians: see the price comparison hub.
Stat definition. Figures on this page pool all qualifying listings in the stated carat range: all colors, clarities, and cut grades, from retailers with at least 30 qualifying listings. The monthly Index benchmark is a different, tighter statistic (E VS1 round Excellent-cut IGI). The two are not comparable and should not be quoted against each other.
Loose stones only. Every figure on this page is for a loose lab grown diamond as listed, before any ring setting. No blended ring-total pricing appears on this page; setting costs vary by retailer and are never merged into these comparisons.
How current are these prices?
Every price on this page was captured from public retailer listings on September 17, 2026 (September 2026 collection cycle) and is accurate as of that date only. Retailers reprice and delist stones continuously, so any listing shown here may have sold, been delisted, or changed price since capture.
- Blue Nile: last verified in its public listings on September 17, 2026. Re-checked on the index's collection cycle (currently monthly; weekly refresh rolling out).
- Brilliant Earth: last verified in its public listings on September 17, 2026. Re-checked on the index's collection cycle (currently monthly; weekly refresh rolling out).
- Clean Origin: last verified in its public listings on September 17, 2026. Re-checked on the index's collection cycle (currently monthly; weekly refresh rolling out).
- Grown Brilliance: last verified in its public listings on September 17, 2026. Re-checked on the index's collection cycle (currently monthly; weekly refresh rolling out).
- Ritani: last verified in its public listings on September 17, 2026. Re-checked on the index's collection cycle (currently monthly; weekly refresh rolling out).
- VRAI: last verified in its public listings on September 17, 2026. Re-checked on the index's collection cycle (currently monthly; weekly refresh rolling out).
About this data
Prices are publicly listed retail prices for loose lab grown diamonds, collected from each retailer's public website on September 17, 2026. No accounts, logins, or paywalls are involved; these are the prices any shopper sees. Rings.com is an independent research publisher, not a jewelry retailer, and publishes this data as an attributed, dated record of public listing prices. Retailer names are used for identification only; Rings.com is not affiliated with any retailer listed.
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Rings.com Lab-Grown Diamond Price Index