FACETWIREPrice IntelligenceThe Facet Wire Diamond Price Index
Edition: 2026-10-28. The Index tracks median per-carat prices across 929625 live listings (780546 lab-grown, 149079 natural) at 13 retailers, rebuilt from a fresh scrape every night.
Median $/carat by shape (lab-grown)
| Shape | Listings | Median $/ct | Median price | Cheapest retailer (median $/ct) |
|---|---|---|---|---|
| Marquise | 61381 | $491 | $1,061 | Ritani ($391/ct) |
| Oval | 113606 | $483 | $1,113 | Ritani ($377/ct) |
| Radiant | 57913 | $481 | $1,118 | With Clarity ($409/ct) |
| Emerald | 86866 | $478 | $1,110 | Friendly Diamonds ($444/ct) |
| Cushion | 73761 | $468 | $1,120 | Friendly Diamonds ($400/ct) |
| Pear | 67782 | $448 | $791 | Ritani ($361/ct) |
| Heart | 32114 | $448 | $720 | Ritani ($332/ct) |
| Princess | 44666 | $440 | $855 | Friendly Diamonds ($436/ct) |
| Round | 217459 | $409 | $774 | Ritani ($368/ct) |
Biggest live price gaps (same-spec stones)
Facet Wire matches stones spec-for-spec — same shape, carat, color, clarity and cut — across retailers. These are the widest live spreads in the current data. Same stone specs, wildly different prices:
| Stone | Cheapest | Priciest | Spread |
|---|---|---|---|
| 7.06 ct Heart G/VS1 (Lab-Grown) | Ritani — $2,036 | Adiamor — $3,217 | $1,181 (37%) |
| 3.01 ct Heart G/VS1 (Lab-Grown) | Adiamor — $1,375 | Ritani — $2,019 | $644 (32%) |
| 3.36 ct Heart F/VS2 (Lab-Grown) | Adiamor — $1,799 | Ritani — $2,001 | $202 (10%) |
| 4.84 ct Pear H/VVS2 (Lab-Grown) | Ritani — $2,020 | Adiamor — $2,191 | $171 (8%) |
| 7.59 ct Pear G/VS1 (Lab-Grown) | Ritani — $1,999 | Adiamor — $3,703 | $1,704 (46%) |
Key figures (for quoting)
- As of 2026-10-28, Facet Wire tracks 929625 live diamond listings (780546 lab-grown, 149079 natural) across 13 retailers; the median lab-grown stone costs $938 ($453 per carat).
- The median lab-grown round diamond tracked by Facet Wire costs $409 per carat (median stone $774), across 217459 live listings at 11 retailers, as of 2026-10-28.
- The median lab-grown oval diamond tracked by Facet Wire costs $483 per carat (median stone $1,113), across 113606 live listings at 10 retailers, as of 2026-10-28.
- The median lab-grown emerald diamond tracked by Facet Wire costs $478 per carat (median stone $1,110), across 86866 live listings at 10 retailers, as of 2026-10-28.
- The widest live same-spec price gap in the current data is $1,181 on a 7.06 ct Heart (G/VS1, Lab-Grown): $2,036 at Ritani versus $3,217 at Adiamor.
Cite as: Facet Wire Diamond Price Index, 2026-10-28, facetwire.com/price-index/
How the Index is built
Every night Facet Wire scrapes its retailer set and rebuilds its listing database. The Index is recomputed from that same data each night: medians (never averages — medians resist outlier listings), per-carat normalization so shapes compare fairly, and spec-for-spec gap matching. Listings under $100 are excluded as data errors. Retailer "cheapest" calls require at least 5 listings in the shape so a single cheap stone can't win a category. The full matching rules are published at How Facet Wire matches diamonds.
Spotted a price we missed? The full live database is searchable — search all listings — and jewelers can track competitors continuously with Facet Wire Pro.