Research

Research that transforms and inspires

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For decades, GIA has been on the cutting edge of gemological research, analyzing data on gems and their characteristics. This effort becomes more challenging each year, as new gem sources emerge and new treatment processes and synthetic materials come onto the market.


Recent Findings

Suite containing over 36 carats of Yogo sapphire
Localities
Gemological Characterization of Sapphires from Yogo Gulch, Montana

A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.

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CVD- and HPHT-grown synthetic diamonds.
Synthetics
Features of Synthetic Diamonds

Presents a visual guide to the growth processes and major gemological spectroscopic features of synthetic diamonds.

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Recently discovered and legendary diamonds in the blue/gray/violet color range
Identification
Natural-Color Blue, Gray, and Violet Diamonds: Allure of the Deep

Summarizes data collected on more than 15,000 natural blue/gray/violet diamonds examined by GIA during the last decade and examines the mechanisms that produce this color range.

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