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Gemstones

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Three cultured pearls, one natural
Real-Time Microradiography of Pearls: A Comparison Between Detectors

Compares the image quality provided by real-time microradiographic imaging (RTX) units fitted with two different detectors: an image intensifier (II) and a flat panel detector (FPD).

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Five-strand Natural Pearl Necklace
X-ray Computed Microtomography: Distinguishing Natural Pearls from Beaded and Non-Beaded Cultured Pearls

The distinction of natural from cultured pearls has traditionally been based on X-radiography.

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A Mixture of Natural and Cultured Pearls
X-ray Computed Microtomography Applied to Pearls: Methodology, Advantages and Limitations

X-ray computed microtomography reveals the internal features of pearls in great detail.

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