GIA Knowledge Sessions: How to Identify Treated Rubies and Sapphires (Mandarin)

Rubies and sapphires are some of the most sought-after gems in the world. As a result, a wide variety of methods have been invented to treat them for color and clarity. Common treatments include assemblage, oil filling, dying, glass filling, lattice diffusion, heating and irradiation. What are the telltale signs of treated corundum? And how do GIA gemologists detect these treatments? Follow GIA Carlsbad Research Associate, Dr. Ziyin Sun, as he covers crucial knowledge to unmasking treatments in these beloved gems.

This webinar will be conducted in Mandarin.