Research & News
Largest Square Cushion-Cut Tsavorite
A 283.74 ct rough tsavorite from Merelani, Tanzania, yields a square cushion-cut gemstone weighing 116.76 ct.
Fossil Insect in Opal
Precious opal hosts a trapped insect.
Second World Emerald Symposium
Important topics such as sustainability, blockchain, nanotechnology, and traceability were discussed at the second World Emerald Symposium held in Bogotá.
Diamond Research Gives Clues to the Formation of the Continents
Mineral inclusions trapped in diamonds reveal the continents’ construction – and helps GIA researchers date diamonds.
Alumni Opportunities to Grow Your Career
Take advantage of GIA Alumni Association benefits and programs to meet fellow alumni, get discounts on GIA education and connect with industry leaders.
Low-Fe, High-V Color-Change Burmese Sapphire
The Carlsbad lab identifies a color-change Burmese sapphire with a unique chemistry profile.