深入讨论红宝石的各方资讯

薛博士将深入讨论红宝石的各方面资讯，包括其开采，鉴定，优化处理，以及原产地鉴定,
并分享她对宝石学家在21世纪所面临挑战的见解。此演讲于2020年6月2日录制。

[@xiaoguozhan3033]

学习了

[@谷口武-e4o]

老师您讲得太好了👏👏👏

[@wilsonlin1954]

Fortunately. I can understand Chinese . Great video .

[@佩彤郑]

赞

[@mdmonzurmorshed1987]

Looks like a wonderful resource. English version would be helpful.

[@shoppingavenue926]

english translation will be greatly appreciated

[@___________________1]

GIA will lose all credibility in the future ...