锂紫玉的历史与知识
Kunzite is a relative newcomer to the array of colored stones available for use in jewelry.
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Reserve your guided museum tour today at GIA and enjoy a unique immersive experience!
2026 AWE & HKCEC
诚邀您莅临香港 HKTDC 展会,探索 GIA 的最新动态,包括仪器示范、零售支持工具、课程查询、现场收检服务及 GIA 宝石学家研讨会等活动。 同时,亦不要错过在会展 GIA展示的珍珠体验专区!
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Sapphire Rush Near Ambatondrazaka, Madagascar (英语)
A newly found deposit of sapphire in Madagascar is explored.
X-ray Computed Microtomography: Distinguishing Natural Pearls from Beaded and Non-Beaded Cultured Pearls
The distinction of natural from cultured pearls traditionally has been based on X-radiography.

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