Yes—a lab-grown diamond is a diamond. It has essentially the same chemical composition, crystal structure and optical properties as a natural diamond. The important difference is origin: one grows in the Earth; the other grows in a controlled laboratory. Knowing that distinction makes it easier to shop with confidence.
“Real” and “natural” are different claims
The word diamond describes a material: carbon atoms arranged in diamond’s crystal structure. A laboratory-grown diamond meets that description. It is not a natural diamond, because it did not form underground. Look for a clear origin term such as “laboratory-grown diamond” or “laboratory-created diamond.” The U.S. Federal Trade Commission’s jewelry guidance calls for this disclosure so shoppers are not led to assume a mined origin.
How does a diamond grow in a lab?
Two established methods are high-pressure, high-temperature (HPHT) and chemical vapor deposition (CVD). HPHT uses high pressure and heat to grow diamond. In CVD, carbon from a gas deposits on a diamond seed inside a controlled chamber. The routes differ, but both can produce diamond crystal—not a coating on another stone. For colored stones, ask whether the color came from growth or a later treatment.
How is it different from a look-alike?
Cubic zirconia and moissanite can resemble diamond in jewelry, but they are different materials called diamond simulants. A lab-grown diamond is not a simulant.
- Natural diamond: diamond formed in the Earth.
- Lab-grown diamond: diamond grown in a laboratory, with its origin disclosed.
- Diamond simulant: a different material used for a diamond-like appearance.
There is no universal “right” choice. Accurate labeling simply lets you choose the material you want.
Can you tell by looking?
Usually not by eye. Natural and laboratory-grown diamonds can look equally brilliant in a finished piece. A basic diamond tester does not establish where a diamond formed. Gemological laboratories use specialized instruments and multiple observations to determine origin. Sparkle comparisons and home tests are not substitutes for reliable documentation.
If a center stone comes with a laboratory report, check that it explicitly identifies the stone as laboratory-grown and that the report details match what is being sold. Do not assume every report uses the same grading language. GIA updated its services for colorless to near-colorless laboratory-grown diamonds in 2025, so older claims that reports for lab-grown and natural stones are “identical” may be outdated.
Five questions to ask before buying
- What is the center stone? Confirm its origin and whether any accent stones are diamonds or other gemstones.
- Can I see the actual piece? Photos or video help you judge sparkle, proportions and how the setting looks on a hand or neck.
- What documentation comes with it? Ask about an independent report when offered, and any disclosed color or clarity treatment.
- How is it made to be worn? Metal, setting security and comfort matter as much as stone origin.
- What happens if it is not right for me? Check the current Refund Policy, especially if your design includes engraving or bespoke work.
Quick answers
Are lab-grown diamonds fake?
No. They are diamonds, but they are not naturally formed diamonds. “Lab-grown” describes their origin.
Are they the same as cubic zirconia or moissanite?
No. Those are different materials that can imitate the look of diamond.
Will a diamond tester reveal the origin?
Not reliably. Simple testers may help distinguish diamond from some simulants, but natural-versus-laboratory-grown identification requires specialist analysis.
Do they need special care?
Care for the diamond and its setting as you would other fine diamond jewelry: protect it from hard knocks, inspect the setting and follow cleaning advice appropriate to the metal and any additional gems.
The takeaway
A lab-grown diamond is a genuine diamond with a laboratory origin. Choose a piece because you love its design and understand what you are getting—not because a label promises more than it can prove. Explore more considered jewelry guidance in our News journal.