FACETWIREPrice IntelligenceThe Facet Wire Diamond Price Index
Edition: 2026-11-01. The Index tracks median per-carat prices across 1043926 live listings (879559 lab-grown, 164367 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 | 71830 | $485 | $1,045 | Ritani ($381/ct) |
| Radiant | 64108 | $478 | $1,127 | With Clarity ($409/ct) |
| Oval | 132221 | $477 | $1,107 | Ritani ($393/ct) |
| Emerald | 95362 | $474 | $1,096 | Friendly Diamonds ($447/ct) |
| Cushion | 81438 | $467 | $1,128 | Friendly Diamonds ($400/ct) |
| Pear | 78068 | $446 | $780 | Ritani ($361/ct) |
| Heart | 35632 | $445 | $710 | Ritani ($332/ct) |
| Princess | 48311 | $438 | $848 | Adiamor ($437/ct) |
| Round | 246013 | $405 | $761 | Ritani ($367/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 |
|---|---|---|---|
| 2.02 ct Oval D/VVS2 (Lab-Grown) | Adiamor — $944 | MiaDonna — $1,773 | $829 (47%) |
| 2.6 ct Emerald D/VS1 (Lab-Grown) | Adiamor — $1,232 | MiaDonna — $2,229 | $997 (45%) |
| 2.14 ct Radiant E/VVS1 (Lab-Grown) | Adiamor — $1,061 | MiaDonna — $2,114 | $1,053 (50%) |
| 2.05 ct Princess F/VS1 (Lab-Grown) | Adiamor — $760 | MiaDonna — $1,088 | $328 (30%) |
| 1.0 ct Pear D/IF (Lab-Grown) | Adiamor — $567 | MiaDonna — $786 | $219 (28%) |
Key figures (for quoting)
- As of 2026-11-01, Facet Wire tracks 1043926 live diamond listings (879559 lab-grown, 164367 natural) across 13 retailers; the median lab-grown stone costs $925 ($450 per carat).
- The median lab-grown round diamond tracked by Facet Wire costs $405 per carat (median stone $761), across 246013 live listings at 11 retailers, as of 2026-11-01.
- The median lab-grown oval diamond tracked by Facet Wire costs $477 per carat (median stone $1,107), across 132221 live listings at 10 retailers, as of 2026-11-01.
- The median lab-grown emerald diamond tracked by Facet Wire costs $474 per carat (median stone $1,096), across 95362 live listings at 10 retailers, as of 2026-11-01.
- The widest live same-spec price gap in the current data is $829 on a 2.02 ct Oval (D/VVS2, Lab-Grown): $944 at Adiamor versus $1,773 at MiaDonna.
Cite as: Facet Wire Diamond Price Index, 2026-11-01, 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.