Live Market Data
Lab-Grown Diamond Price Index
Real asking prices from our live lab-grown inventory, each stone listed with its grading report — recalculated every day. Last updated July 10, 2026.
A 1-carat round lab diamond is $426 today.
Best value per carat right now: Emerald at $340/ct · 1,415 lab-grown stones sampled.
| Shape | Avg $/carat | 1.0 ct | 1.5 ct | 2.0 ct |
|---|---|---|---|---|
| Round | $547 | $426 | $833 | $874 |
| Oval | $415 | $395 | $785 | $696 |
| Princess | $344 | $360 | $596 | $767 |
| Emerald | $340 | $368 | $525 | $857 |
| Pear | $387 | $352 | $610 | $613 |
| Marquise | $863 | $427 | — | $1,071 |
| Cushion | $365 | $388 | $628 | $784 |
| Asscher | $371 | $305 | $678 | $837 |
| Radiant | $369 | $341 | $585 | $919 |
| Heart | $416 | $376 | $696 | $900 |
Median asking prices in each size bracket. “—” means no stones in that bracket today.
Price trend
Methodology
Each day we sample our live wholesale-network inventory of lab-grown diamonds, each listed with its grading report (about 1,500 stones across ten shapes), apply our everyday retail pricing, and record the average price per carat plus the median asking price at 1.0, 1.5, and 2.0 carats. Prices are retail asking prices in USD, not trade prices. The sample and method stay constant so day-to-day movements are comparable.
Journalists & researchers: this data is free to cite with a link to this page. Questions about the data: gallojewelry@gmail.com · 973-890-7000.