Unusual Phenomenal Colored Stones | GIA Knowledge Sessions Webinar Series

By admin | December 17, 2021 |

Unusual Phenomenal Colored Stones | GIA Knowledge Sessions Webinar Series

GIA Knowledge Sessions Webinar – recorded live on September 30, 2021.

From star sapphires to opals to alexandrites, phenomenal gems are nothing short of, well, phenomenal! They each have special properties that allow them to interact with light in an unusual way, causing them to display effects such as asterism, play-of-color and color change. Journey along with GIA researchers Aaron Palke and Ziyin Sun as they dive into the science and mystery of phenomenal gems, nature’s rock stars.

Read more of Dr. Aaron Palke’s research:
https://www.gia.edu/gems-gemology/winter-2016-microworld-sphalerite-inclusions-namibian-demantoid
https://www.gia.edu/gems-gemology/fall-2015-microworld-glassy-melt-inclusions-sapphires-montana
https://www.gia.edu/gems-gemology/fall-2016-microworld-sphalerite-topaz

Posted in Purple Ray Opal

10 Comments

  1. John t on December 17, 2021 at 9:50 am

    Coming from jtv to GIA moving up! CONGRATS!



  2. Saeed mar Hh on December 17, 2021 at 9:53 am

    I have stones



  3. Dorette S on December 17, 2021 at 10:01 am

    Thank you GIA!



  4. Panaceias Úberes on December 17, 2021 at 10:03 am

    Such unusual stones… and the proof that beauty is a very complex characteristic.



  5. anna on December 17, 2021 at 10:06 am

    So fun as a student to watch these!!!



  6. kolkata gems on December 17, 2021 at 10:11 am

    Thanks for sharing such a great knowledge



  7. CRISTINA LAGO on December 17, 2021 at 10:13 am

    Fantastic Presentation!



  8. Ronnie Boucher on December 17, 2021 at 10:35 am

    the best stone = has GEM FIRE ! in a nut shell !



  9. Kathy Jean on December 17, 2021 at 10:36 am

    Thank you.



  10. Ronnie Boucher on December 17, 2021 at 10:45 am

    it is not good light return it is breaking light into it`s own bands and refracting the spilt light through the stone = GEM FIRE ! i hate these guy`s the waffle on about crap for a job !