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Research & News
Lab Notes
A “Hollow” Pearl Filled with Foreign Materials
Conclusively identifying the origin of a “hollow” pearl filled with foreign materials proves challenging.
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Micro-World
Purple Fluorite Inclusion in Emerald from Russia
The second instance of Russian emerald with a rare purple fluorite inclusion may hint at origin.
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Gem News International
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.
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Lab Notes
Separation of Kornerupine and Prismatine
GIA’s laboratories are now using LA-ICP-MS to separate kornerupine from prismatine based on boron concentrations.
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Micro-World
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.
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Gem News International
Rubies from Rock Creek, Montana
A study on American ruby and sapphire from Rock Creek, Montana, unveils a few geochemical mysteries.
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