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Ren Lu GG
Article
Infrared Microscopy Applications

Explores the usefulness of this technique in the mapping of defects and spectral features, the determination of color origin, and the identification of synthetic and treated diamond melee.

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Portable Instruments and Tips on Practical Gemology in the Field

Buying gems or jewelry can be challenging even when one has access to a fully equipped lab.

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Article
3-D Printing: GIA Equips Students for a ‘Technology Revolution’

The potential of 3-D printing is mind-boggling for jewelry design and manufacturing, where time, precision and cost-effectiveness are highly valued.

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Fluorescence image of Aurora Butterfly of Peace
An Introduction to Photoluminescence Spectroscopy for Diamond and Its Applications in Gemology

Presents the underlying physics and methodology of this analytical technique, which has become an essential tool in identifying treated and synthetic diamonds.

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Developments in Gemstone Analysis Techniques and Instrumentation During the 2000s

The first decade of the 2000s continued the trend of using more powerful analytical instruments to solve gem identification problems.

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Irradiated 1.06 ct brownish orange HPHT synthetic diamond
Photoluminescence Mapping of Optical Defects in HPHT Synthetic Diamond

Demonstrates the importance of this method in identifying diamond treatments, based on the analysis of PL maps acquired from a brownish orange HPHT synthetic diamond.

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Freshwater pearl samples
Provenance Discrimination of Freshwater Pearls by LA-ICP-MS and Linear Discriminant Analysis (LDA)

Investigates trace-element chemistry of freshwater natural pearls from North America and China with LA-ICP-MS and uses LDA to identify their origins.

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Article
Instruments Revolutionize Gem Identification Process

An overview of how GIA's instrument development helped gemologist identify gemstones

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Article
Carnegie Scientists Use Diamond Presses to Study Planet Formation

Research using diamond presses gives insight to planetary formation

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Digital Photomicrography for Gemologists

A guide to capturing gem inclusion scenes using practical equipment and techniques and the appropriate image-refining software.

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