FACETWIREPrice IntelligenceThe Facet Wire Diamond Price Index
Edition: 2026-10-27. The Index tracks median per-carat prices across 53468 live listings (52690 lab-grown, 778 natural) at 12 retailers, rebuilt from a fresh scrape every night.
Median $/carat by shape (lab-grown)
| Shape | Listings | Median $/ct | Median price | Cheapest retailer (median $/ct) |
|---|---|---|---|---|
| Radiant | 664 | $701 | $1,240 | With Clarity ($409/ct) |
| Pear | 884 | $630 | $1,265 | Ritani ($361/ct) |
| Cushion | 6804 | $619 | $1,630 | Friendly Diamonds ($400/ct) |
| Oval | 1306 | $614 | $1,359 | Ritani ($377/ct) |
| Emerald | 12704 | $600 | $1,580 | Friendly Diamonds ($444/ct) |
| Marquise | 12759 | $579 | $1,300 | Ritani ($391/ct) |
| Heart | 4417 | $560 | $1,000 | Ritani ($332/ct) |
| Round | 2485 | $560 | $740 | Ritani ($368/ct) |
| Princess | 410 | $519 | $1,050 | Friendly Diamonds ($436/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 |
|---|---|---|---|
| 1.05 ct Pear D/VVS2 (Lab-Grown) | Ritani — $401 | MiaDonna — $824 | $423 (51%) |
Key figures (for quoting)
- As of 2026-10-27, Facet Wire tracks 53468 live diamond listings (52690 lab-grown, 778 natural) across 12 retailers; the median lab-grown stone costs $1,395 ($597 per carat).
- The median lab-grown marquise diamond tracked by Facet Wire costs $579 per carat (median stone $1,300), across 12759 live listings at 10 retailers, as of 2026-10-27.
- The median lab-grown emerald diamond tracked by Facet Wire costs $600 per carat (median stone $1,580), across 12704 live listings at 9 retailers, as of 2026-10-27.
- The median lab-grown cushion diamond tracked by Facet Wire costs $619 per carat (median stone $1,630), across 6804 live listings at 9 retailers, as of 2026-10-27.
- The widest live same-spec price gap in the current data is $423 on a 1.05 ct Pear (D/VVS2, Lab-Grown): $401 at Ritani versus $824 at MiaDonna.
Cite as: Facet Wire Diamond Price Index, 2026-10-27, 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.