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A group of rough sapphires encircle cut sapphires.
Article
Montana Yogo Sapphires’ Unique Gemmology

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

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Accurate Reporting of Key Trace Elements in Ruby and Sapphire Using Matrix-Matched Standards

Presents a group of corundum standards developed by GIA to improve the accuracy and efficiency of its laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) instruments.

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Worker attaching wax forms
Article
Shenzhen: The Frontier of China’s Gem and Jewellery Industry

All jewellery professionals are familiar with the city of Shenzhen, a global jewellery manufacturing centre and a leader of China’s fast-growing gem and jewellery industry. Join the GIA team as we tour the city and discover more about its leading jewellery brands.

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Article
Photography Tips: A Gem’s Best Face Forward

Everyone would agree that exposure and focus are the most critical aspects to consider when photographing gems or jewellery. But there are two other practices that take this kind of photography even further: lighting and positioning of the gem or jewel. The first component ensures a successful photograph. The second makes a picture interesting – or even compelling.

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Abstract Header from the 2009 issue of Gems & Gemology
Abstracts; Summer 2009

This article, from the Summer 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.

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Sapphires from Australia

An overview of Australia's recent significance in the production of blue sapphire.

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Gemstone Durability: Design to Display

A treatise on the design, display, care and repair of fine gemstones.

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Heat Treating Corundum: The Bangkok Operation

An overview of the potential effects that heat treatment can have on corundum.

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Article
Decades-Old Synthetic Alexandrite Sheds Light on Modern-Day Research Needs

An overview and commentary on the 2012 Journal of Gemmology article, “Flux-grown synthetic alexandrites from Creative Crystals Inc.”

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Heat Treating Ruby and Sapphire: Technical Aspects

A review of heat treatment methods available for use on natural or synthetic corundum.

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