Frequently Asked Questions

Does GIA grade laboratory-grown diamonds?


Yes. GIA has been grading laboratory-grown diamonds since 2007. Beginning July 1, 2019, GIA Laboratory-Grown Diamond Reports and identification reports no longer use the term “synthetic.” The GIA Laboratory-Grown Diamond Report includes the standard GIA color, clarity and cut grading scales for reference purposes. The reports use descriptive terms to identify color and clarity. Each report will include a statement that identifies the type of growth process used, CVD (Chemical Vapor Deposition) or HPHT (High Pressure High Temperature), and will indicate if there is evidence of post-growth treatments to change the color.

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