Sapphires: From Ceylon to Ethiopia | GIA Knowledge Sessions Webinar Series 

I wish to become a graduate Gemologist with GIA. These videos are so informative and I always enjoy watching! I hope I can come study in person, it would be my dream come true :) Thank You!

Great presenter and presentation. Wish these online lectures had been available when I studied at GIA.

Lots of of informations elaborated in simplified manner. I feel very fortunate.Thanks alot Nathan and especially Wim Vertriast Field Gemologist.

Excellent webinar. Thank you.

Great webinar many thanks

Great talk! Thanks 💎

Great session

Sapphire is the king and the ruby is the queen 👑

Merci pour le partage GIA. Amélie. Gem-A student. 🇬🇧

So awsome to listen to this webinar lecture along side taking diamonds and diamond grading at GIA, 💙 gemology rocks!

Excellent! Thank you very much

Excellent video for an overview of the main sapphire sources.

Thanks Wim for an excellent series of lectures. I really hope that you find time to make one on the other coloured corundums.

Amazing thanks!

🤴 please let me see the natural ston

I have yellow n blue 40 and 47 gram stone not processed natural, respectively stone ..from pader...but don't know how valuable are they ..and where I cn sell them...

what about Cameroon sapphires?

An educational institution like GIA, where I trained, should aim to do better than this video. What we see here is a photo album rather than a gemological presentation on the historical locales of sapphires. Poorly done.