Lab-Grown Diamonds
Identical to mined diamonds in every measurable way, grown rather than extracted. The same gemologist-level filtering, at a different price.
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About Lab-Grown Diamonds
Every stone in this search is a loose lab-grown diamond with a grading report, listed with its own photos, its report and its live price. Every stone is graded by IGI or GIA. Choose a stone here and set it in a ring with the ring builder, or keep it loose.
What a lab-grown diamond is
A lab-grown diamond is carbon crystallized in the same structure as a mined diamond, so it has the same hardness, brilliance and fire. It is grown in a laboratory rather than taken from the ground. A grading lab can tell the two apart with specialist equipment; the eye cannot. For a longer comparison, read lab-grown vs natural diamonds.
How to read a stone's listing
Each listing gives the four grades on the report and the measurements:
- Cut decides how much a stone sparkles. On round stones, Excellent or Ideal is worth prioritising. Fancy shapes (oval, pear, marquise, emerald, radiant) carry polish and symmetry grades instead; look for Excellent or Very Good on both.
- Color runs from D (colorless) down the alphabet. D to F reads icy white; G and H read white to most people once set.
- Clarity describes inclusions. VS1 and VS2 stones are usually clean to the eye in brilliant shapes. Step cuts such as emerald and Asscher show more through their open facets, so a higher clarity pays off there.
- Carat is weight, not size. Ovals, pears and marquise stones spread their weight over a longer outline, so they look larger than a round of the same carat. Compare the millimetre measurements as well as the carat.
The grading report
The report number is on every listing, and the report itself opens from the stone's page. You can check it on the grading lab's own website before you buy. The differences between the two labs are explained in IGI vs GIA for lab-grown diamonds.
Seeing the stone before you decide
Most stones have a video as well as photos, so you can see how the stone moves in the light. If you want a second opinion on a particular stone, use Ask about this stone on its page: the question reaches our team in New York with the stone's details attached, and we reply by email.
Shipping, returns and warranty
Loose diamonds ship free and insured within the United States. An unset stone in its original condition, with its report, may be returned or exchanged within 14 days of delivery. Every stone carries a 1-year warranty. Full terms are on shipping and returns.
Setting it in a ring
Pick a stone, then choose a setting in the ring builder, or start with a setting and come back for the stone. For ideas at different budgets, see lab-grown engagement rings under $3,000.
Questions
Are lab-grown diamonds real diamonds?
Yes. A lab-grown diamond is carbon in the same crystal structure as a mined diamond, with the same hardness and brilliance. Only its origin differs, and the grading report states that it is laboratory-grown.
Who grades your lab-grown diamonds?
Every stone here is graded by IGI or GIA. The report number is on each listing and the report opens from the stone's page, so you can check it on the lab's website.
Can I see the actual stone before buying?
Each listing shows photos of that stone, and most also have a video. To ask about a specific stone, use Ask about this stone on its page and we reply by email.
What if the stone isn't right for me?
An unset loose diamond in its original condition, with its report, may be returned or exchanged within 14 days of delivery. See shipping and returns.
Can you set the stone in a ring?
Yes. Choose the stone, then a setting in the ring builder. Settings are priced separately.
Do lab-grown diamonds keep their value?
Lab-grown diamonds resell for much less than they cost, more so than natural diamonds. Buy one for how it looks and what it costs, not as an investment.
How is a loose diamond shipped?
Free and insured within the United States.