Geology 101: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series

GIA Knowledge Sessions Webinar - recorded live on July 2, 2020.

What makes a gemstone rare and why are some gems rarer than others? The answer lies in gemstone geology. Some gems, such as emerald, require extraordinary geologic circumstances to form. Not only do different rock types need to meet under the right conditions and crystallize, certain rare elements often also need to be part of the mixture for the crystal to be the right color. Wim Vertriest, supervisor of field gemology, covers the chemistry of Earth’s crust and the geologic criteria for forming rubies, sapphires and some of the world’s most valuable gems.

Read more of Wim Vertriest's research:

[Nighthawk]

I am a certified GIA gemologist and the geological formation of gemstones is very very well explained in this video.

[GemologyforSchmucks]

Absolutely phenomenal. Huge thanks to Wim for bringing this information in a way that is digestible and GIA for hosting the events.

[angelamolinagaffney]

Stephanie, played this song for me while i was in Ice's, kitchen cleaning. I could only hear throw wall so i walked into livingroom area but i was drawn by the vocals and listened till she interrupted song asking sternly what i thought. You remember that day i hope.. i will never forget it. Can't thank her enough for pushing this in my face!!! 😆😍

[marcoramos]

Just the second video I've watched from GIA Knowledge series and I'm so impressed with the speakers and technical level of the content. I'm a big fan now. I'm not a gemologist, or geologist, but as a chemist I'm fascinated by all the sciences. More please :)

[serebart]

I absolutely loved this video!
Highly informative, perfectly explained, useful graphics and photos, good pace: amazing job!

Thank you so much and thanks to Mother Earth for creating such stunning works of art!

[carycervantes]

Absolutely stunning webinar. I've learned and remembered so much thank you.

[ninapinzarrone]

amazing webinar. I love the analogies. I can't wait for next week's Gems 102. Wim is fantastic.

[innaalekseenko]

Simply brilliant webinar! Thank you sooo much, Wim, for such an informative and easy-to-digest talk👏

[manman]

This is an excellent presentation.
Thank you Wim!

[MissAngie]

Thanks, for uploading this very informative educational video on colored gemstones.

[melaD]

Amazing presentation..easy to follow and extremely informative!! Thank you!

[mwilakapita]

Watching from Zambia, thank you for this very educative presentation.

[baldergems]

Great video session! Thanks GIA and Wim!

[metatron]

I love you GIA....You are the Best! thank you for sharing it on Youtube

[WhereIsMyLipstick]

Thank you for this insightful webinar!

[jasonbourdon]

Yes, my Mom, Robin Fishburn found some of the largest black tourmaline crystals, in the state of California. This was according to all the local dealers & shop owners in the Madera County area.

[guntherrobbert]

Thanks a lot for this excellent talk. IT's very informative and easily understandable also for a layman like me.
However I've a question: I recently heard that Newsealand is the tip of an indivual plate in the pacific area. Is that correct?

[dilrukperera]

Amazing presentation... Greetings from Sri Lanka

[lindajolly]

Thank you. This is very good information for beginners.

[deebagemsminerals]

This is awesome video as gemologist I watch every GIA Youtube video and it expend my Knowledge a bundle of thanks 🙏 for GIA for such a great opportunity