Frequently Asked Questions

What pearl classification system does GIA use?


The GIA uses a comprehensive standard it developed over a 60-year period of ground-breaking research on pearls, called The GIA 7 Pearl Value Factors™ (Size, Shape, Color, Luster, Surface, Nacre, and Matching).

The GIA 7 Pearl Value Factors™ provide a systematic way to evaluate pearls of all types, and to describe their appearance and quality in a way everyone can understand.

Learn more about how GIA identifies and classifies pearls.

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