Research Article Search Results
Natural-Color Pink, Purple, Red, and Brown Diamonds: Band of Many Colors
Summarizes data collected by GIA on more than 90,000 natural diamonds in this color range and presents their gemological and spectroscopic properties.
Gilson Cat’s-Eye Synthetic Emerald
In the early 1960s, French ceramist and engineer Pierre Gilson succeeded in growing and producing flux synthetic emerald of commercially marketable quality.
Microscopic Observations of Blue Sapphires Treated with Heat and Pressure
In recent months, sapphires treated under heat and pressure have been documented in the trade.
Diamond Identification
Diamond Geology
Diamond Identification
Colored Stones and Pearls
Diamond Geology
Futurescape Forum
A recap of the Futurescape Forum panel from GIA’s 2018 International Gemological Symposium.
Colored Stones and Pearls | Gems & Gemology
Gemstone Guidebook Project
A project coordinated by GIA and the NGO Pact provides a valuable educational tool to women miners in Tanzania.
