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-color from treated-color pearls.

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