Dr. James Shigley, distinguished research fellow at GIA, provides an update on GIA’s research efforts related to country-of-origin reporting for colored stones and diamonds.

This video was recorded live at GIA Carlsbad on March 4, 2020.

Every month, GIA hosts guest lectures at the Carlsbad campus that are open to students and the public. Unable to attend in person? Visit our Facebook event page here: [ Ссылка ] to view upcoming live-stream activities.

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