Origin is separate
Lab-grown identifies where and how the diamond formed.
Clear Disclosure
Lab-Grown Diamond Treatments & Disclosure
Understand as-grown color, post-growth treatment, laboratory detection, and the information that should accompany a diamond.
AI-generated educational visual; artistic representation.
The Essential Idea
Laboratory-grown origin and treatment are separate descriptions. A diamond can be lab-grown and display color as grown, or it may undergo a process after growth to alter or refine color.
Treatment does not make a lab-grown diamond a simulant. The essential principle is clear, accurate disclosure of what is known about the diamond.
Treatment is separate
Post-growth processes may influence color or appearance.
Wording matters
Read the laboratory conclusion and product description carefully.
During Crystal Growth
What As-Grown Means
As-grown describes characteristics developed while the diamond crystal was forming in the growth chamber. Growth method, trace elements, and crystal defects can influence the resulting color.
An as-grown description does not mean every characteristic is identical among diamonds from the same process; each diamond still requires individual evaluation.
After Crystal Growth
What Post-Growth Treatment Means
Controlled heat, pressure, irradiation, annealing, or combinations of processes may be used after growth to change or improve color. Laboratories use specialized testing to look for evidence of these processes.
Report language may state that post-growth treatment was detected, not detected, or that a conclusion could not be reached. The exact wording matters.
Consumer Confidence
What Clear Disclosure Looks Like
The description lab-grown should appear clearly with diamond, not be hidden in a distant page or hashtag. Known or laboratory-detected treatment information should also be stated in a place customers can reasonably find before purchase.
At Lab Diamonds of America, all diamonds are lab-grown. Product information should identify diamond color, quality specifications, known treatment information, metal, measurements, and finished-piece details as accurately as possible.
From Education to Exploration
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Explore Clearly Identified Lab-Grown Diamonds
Discover color and white diamond jewelry with lab-grown origin central to every collection.Educational sources and further reading
Terminology and facts were reviewed against current guidance from independent gemological and U.S. consumer-protection authorities. Report formats and services can change.