FACETWIREPrice IntelligenceNatural vs lab-grown diamonds: the price difference, from live listings
Same shapes, same grading scales, two very different price tags. Facet Wire tracks 53,622 live listings across 12 retailers; these are the medians from the 53,468 listings priced $100 and up, as of 2026-10-27 — refreshed nightly.
Median price per carat, by shape
Per-carat pricing is the fair comparison — it removes stone size from the picture. Counts in parentheses are the live listings behind each median.
| Shape | Natural $/ct | Lab-grown $/ct | Natural premium | Natural median stone | Lab median stone |
|---|---|---|---|---|---|
| Marquise | $10,663 (42) | $579 (12,759) | 18.4× | $16,414 | $1,300 |
| Oval | $7,213 (73) | $614 (1,306) | 11.8× | $12,678 | $1,359 |
| Pear | $6,905 (42) | $630 (884) | 11.0× | $10,664 | $1,265 |
| Emerald | $5,976 (55) | $600 (12,704) | 10.0× | $8,832 | $1,580 |
| Princess | $4,941 (49) | $519 (410) | 9.5× | $6,536 | $1,050 |
| Cushion | $5,841 (56) | $619 (6,804) | 9.4× | $7,956 | $1,630 |
| Heart | $4,697 (43) | $560 (4,417) | 8.4× | $6,173 | $1,000 |
| Radiant | $5,371 (46) | $701 (664) | 7.7× | $8,497 | $1,240 |
| Round | $2,122 (354) | $560 (2,485) | 3.8× | $627 | $740 |
Not shown: Asscher (natural n=3, lab n=1039) — a shape appears only when both sides have at least 20 tracked listings, so every figure above rests on a real sample.
What a round diamond actually costs, by size
Rounds are the most-tracked shape on both sides, so they carry the deepest samples. Band medians use stones within roughly a tenth of a carat of each size (wider for 3 ct).
| Size | Natural median stone | Lab-grown median stone |
|---|---|---|
| 0.5 ct round | $773 (31 stones) | $165 (136 stones) |
| 1 ct round | $4,595 (7 stones) | $570 (545 stones) |
| 1.5 ct round | $9,284 (8 stones) | $800 (405 stones) |
| 2 ct round | $15,202 (5 stones) | $1,172 (272 stones) |
| 3 ct round | $41,070 (6 stones) | $2,412 (142 stones) |
Why the gap exists
A natural diamond is mined, cut and passed through a long supply chain built on scarcity; a lab-grown diamond is produced in a reactor or press in weeks. Both are real diamond — identical chemistry, the same grading scales, certificates from the same labs. What you pay for with a natural stone is rarity and resale tradition; what you give up with a lab stone is that rarity, in exchange for the same look at a fraction of the price. The tables above are the size of that trade today, measured across the live market instead of quoted from a brochure.
Questions
How much cheaper is a lab-grown diamond than a natural one?
Across 53,468 live listings tracked on 2026-10-27, the median natural diamond costs $3,255 per carat and the median lab-grown diamond $597 per carat — natural runs about 5.4 times the lab price per carat. The gap depends on shape: marquise shows the widest difference at 18.4 times.
Is a lab-grown diamond a real diamond?
Yes. Lab-grown diamonds are chemically and physically diamond; they are graded on the same carat, cut, color and clarity scales and carry certificates from the same labs (GIA, IGI). The price difference comes from supply: mined stones are scarce, grown stones are not.
Where do these numbers come from?
Facet Wire tracks 53,622 live listings across 12 retailers and recomputes these medians nightly. Listings under $100 are excluded as data errors, and every figure on this page shows the number of listings behind it.