Research & News
A “Hollow” Pearl Filled with Foreign Materials
Conclusively identifying the origin of a “hollow” pearl filled with foreign materials proves challenging.
Purple Fluorite Inclusion in Emerald from Russia
The second instance of Russian emerald with a rare purple fluorite inclusion may hint at origin.
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.
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.
Rubies from Rock Creek, Montana
A study on American ruby and sapphire from Rock Creek, Montana, unveils a few geochemical mysteries.