Geology 102: Natural Processes that Form Colored Gemstones | GIA Knowledge Sessions Webinar Series

GIA Knowledge Sessions Webinar - recorded live on April 1, 2021. Gemstones require extraordinary geologic circumstances to form. Not only do different minerals need to meet under the right conditions and crystallize, but certain rare elements also need to be part of the mixture for the crystal to be the right color. Tune in as Wim Vertriest, supervisor of field gemology, builds on the earth science introduced in “Geology 101 for Gemologists” to explore how alexandrite and spinel form in the earth’s crust and why pegmatites – an igneous rock that is the source of an incredible variety of gems and mineral specimens – are known as "nature's treasure chest." Watch Geology 101: Natural Processes that Form Colored Gemstones:    • Geology 101: Natural Processes that Form C...   Read more of Wim Vertriest's research: https://www.gia.edu/gems-gemology/spr... https://www.gia.edu/gems-gemology/win... https://www.gia.edu/gems-gemology/sum...