Lab-Grown vs Natural Diamonds: What Actually Differs
Published . Updated . 1 minute read.
Editorial review: Disclosure guidance checked against the FTC Jewelry Guides. Market observations are general and deliberately avoid specific price figures, which change quickly. Last reviewed .
The lab-grown versus natural debate is often framed as a moral or quality question. For most buyers it is really about budget, meaning and how you feel about resale.
Side by side
| Lab-grown diamond | Natural diamond | |
|---|---|---|
| Composition | Carbon, diamond crystal structure | Carbon, diamond crystal structure |
| Hardness | 10 on the Mohs scale | 10 on the Mohs scale |
| Looks different to the eye? | No | No |
| How it is identified | Advanced lab equipment | Advanced lab equipment |
| Typical price for similar size and quality | Considerably lower | Higher |
| Resale value | Low and uncertain | Some, well below retail |
| Required U.S. disclosure | Must be described as lab-grown or lab-created | None specific to origin |
How lab-grown diamonds are made
There are two main methods. HPHT (high pressure, high temperature) recreates conditions similar to the earth’s mantle. CVD (chemical vapor deposition) builds up carbon atoms layer by layer on a seed crystal. Some stones are treated after growth to improve color. Reputable reports note the growth method or post-growth treatment where detected.
Grading reports
Independent laboratories issue reports for lab-grown diamonds, and these reports should state clearly that the stone is laboratory-grown. Report formats and terminology differ between labs and have changed over time, so read the report you are given rather than assuming it matches a natural-diamond report line for line.
Who each suits
Choose lab-grown if you want the largest, whitest stone your budget allows and you are not concerned about resale.
Choose natural if the geological origin matters to you, you want the stone to keep some value, or it is intended as an heirloom.
Whatever you choose, apply the same checks: cut quality, a matching report and a clear return policy. If you are also considering a non-diamond stone, read moissanite vs diamond.
Frequently asked questions
Are lab-grown diamonds real diamonds?
Yes. They are crystallized carbon with the same structure and properties as mined diamonds. They must, however, be clearly disclosed as laboratory-grown or laboratory-created when sold.
Do lab-grown diamonds hold their value?
Generally, no. Retail prices for lab-grown diamonds have fallen substantially in recent years and the resale market for them is limited. Buy one because you love the ring, not as a store of value.
Are lab-grown diamonds more ethical?
It depends on what matters to you. Lab-grown diamonds avoid mining, but production uses significant energy and the footprint depends on the power source. Treat broad sustainability claims with care and look for specifics.
Sources and further reading
- The 4Cs of diamond quality (Gemological Institute of America)
- Guides for the Jewelry, Precious Metals, and Pewter Industries (16 CFR Part 23) (U.S. Federal Trade Commission, via eCFR)