Open data
Open data
Median price by shape.
Median USD per carat by diamond shape, natural and lab-grown, tracked monthly. Lines show natural medians; the full natural and lab series for every shape are in the download.
Round
Oval
Cushion
Princess
Emerald
Pear
Marquise
Radiant
Asscher
Heart
Dec ’25Jan ’26Feb ’26Mar ’26Apr ’26May ’26Jun ’26Jul ’26Aug ’26Sep ’26
Each point is the median USD per carat from a systematic 1-in-10 sample of listings, one observation per listing per calendar month, in pinned-rate USD. Cells below 150 sampled stones in a month are withheld rather than shown.
Latest median by shape
| Shape | Natural | Lab-grown |
|---|---|---|
| Radiant | $3,091 | $474 |
| Cushion | $2,948 | $516 |
| Oval | $2,655 | $453 |
| Asscher | $2,504 | $470 |
| Heart | $2,374 | $421 |
| Pear | $2,307 | $452 |
| Emerald | $2,278 | $451 |
| Marquise | $2,268 | $485 |
| Round | $2,248 | $414 |
| Princess | $2,158 | $461 |
Cite as: Carat Hunter, Caratlytics Diamond Price Index, 2026-09, caratlytics.com. Licensed CC BY 4.0.