Frequently asked questions

How does GIA identify whether pearls are natural or cultured?

GIA uses digital X-radiography, as well traditional visual observation and a variety of advanced testing equipment, to determine if a pearl is natural or cultured. Microradiography is the most reliable non-destructive way of seeing the internal structure of pearls. All pearls are subject to this analysis and this test can be used to separate natural-colour from treated-colour pearls.