Research & News
Separation of Kornerupine and Prismatine
GIA’s laboratories are now using LA-ICP-MS to separate kornerupine from prismatine based on boron concentrations.
Mexican Opal with Large Fluid Inclusion
A common opal with a large eye-visible fluid inclusion is a first for the San Simon mine in Jalisco, Mexico.
Ornamental Jadeites from the Polar Urals of Russia
Gemological and trace element chemical characteristics of ornamental jadeites from the Levoketchpel deposit in Russia are compared with other sources.
Kimberlites: Earth’s Diamond Delivery System
Examines the basic characteristics of kimberlites and their relationship with diamonds.
Curved Banding in Flame-Fusion Synthetic Sapphires
The appearance of curved banding under short-wave UV easily identifies flame-fusion synthetic sapphire.
Low-Temperature Heat Treatment on Pink Sapphire
Twelve pink sapphires undergo low-temperature heat treatment and reveal a correlation with the 3232 cm-1 FTIR peak.