Find the cheapest lab-grown diamonds.
The cheapest place to buy a lab-grown diamond changes from stone to stone, because each retailer prices the same certified diamond differently. Across the 11 retailers CaratRank tracks, the lowest in-stock lab-grown price right now is $85. CaratRank checks all 11 on every search and ranks every seller of the exact certified stone, so you can see who is cheapest for the one you want.
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Lowest lab-grown diamond prices by carat
The lowest in-stock price we currently see for each carat size, across every retailer we track. A dash means we have not indexed that size yet; run a live search for today's price.
| Carat | Lowest | Typical | Retailers |
|---|---|---|---|
| 0.5 ct | $85 | $282 | 8 |
| 0.75 ct | — | — | — |
| 1 ct | $157 | $396 | 10 |
| 1.25 ct | $419 | $578 | 2 |
| 1.5 ct | $204 | $577 | 10 |
| 2 ct | $214 | $1,700 | 11 |
| 3 ct | $1,444 | $2,684 | 7 |
Cheapest lab-grown diamonds by shape
Round is the most stocked and usually the most competitively priced; fancy shapes vary more.
| Shape | Lowest | Typical | Retailers |
|---|---|---|---|
| Oval | $85 | $287 | 8 |
| Round | $157 | $422 | 9 |
| Cushion | $204 | $565 | 8 |
| Emerald | $214 | $691 | 9 |
| Radiant | $365 | $597 | 1 |
| Oval | $380 | $555 | 1 |
| Princess | $401 | $486 | 1 |
| Pear | $414 | $2,395 | 7 |
| Marquise | $523 | $2,938 | 9 |
| Round | $610 | $670 | 1 |
What moves the price
Two diamonds with the same certificate are the same stone, so any price gap between sellers is pure markup. Across grades, price rises with carat, then with color (D-F vs G-J) and clarity (VVS vs VS vs SI). The value sweet spot for most buyers is a near-colorless, eye-clean stone (G-H, VS-SI) in an excellent or ideal cut. CaratRank lets you hold the grades fixed and compare only the price.
Lab-grown diamond prices, answered
Where is the cheapest place to buy lab-grown diamonds?
It depends on the exact stone, because each retailer prices the same certified diamond differently. Across the 11 retailers CaratRank tracks, the lowest in-stock lab-grown price right now is $85. CaratRank ranks every seller of the same certified stone so you can see who is cheapest for the one you want.
How much should a 1-carat lab-grown diamond cost?
Around $157 at the low end across 10 retailers. Price moves with color, clarity, and cut, so compare the same grades across sellers rather than a single list price.
Is the cheapest listing really the same diamond?
CaratRank matches on the lab certificate number (IGI, GIA, or GCAL), so the prices you compare are for the identical stone. Anything that is only a likely match is labeled, not hidden.
How many retailers does CaratRank check?
All 11 on every search, not a curated few, so the lowest price reflects the whole market we cover rather than a paid placement.
Are lab-grown diamonds cheaper than natural diamonds?
Yes. A comparable lab-grown stone usually costs much less than a natural one of the same shape, carat, color, and clarity, which is why most shoppers comparing on price choose lab-grown.