Research & News
Large Pinkish Orange CVD Synthetic Diamond
A combination of size, color, and clarity made this the most remarkable CVD synthetic diamond GIA has tested so far.
2018 GIA Symposium
Scientists and business leaders will gather at a summit of the gem and jewelry industry.
Advanced Synthetic Diamond Seminar in Hong Kong, June 19
Learn the latest techniques to identify synthetic diamonds from GIA researchers. Seating is Limited.
Five CVD Synthetic Diamonds Greater Than Three Carats
The GIA lab examines five gem-quality CVD-grown diamonds in sizes that reflect the improving technology of the synthetic gemstone industry.
Pink Tourmaline in Spodumene
A large, rare inclusion is found in a spodumene host.
Very Small Akoya Cultured Pearls
A selection of very small akoya cultured specimens demonstrates the challenges gemologists face when determining pearl origin.