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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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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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Reactor-Irradiated Green Topaz

Examination of samples of faceted "Ocean green" topaz reveals that this material has been irradiated in a nuclear reactor.

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Thermal Alteration of Inclusions in "Rutilated" Topaz

Faceted colourless topaz containing acicular inclusions has been offered for sale as "rutilated" topaz.

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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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Altering the Colour of Topaz

A review of the various techniques in use today to change colourless topaz to a variety of hues.

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Irradiated Topaz and Radioactivity

Large quantities of colourless topaz are currently being treated by gamma irradiation to turn them blue.

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Abstracts; Summer 1991

From the Summer 1991 issue of Gems & Gemmology, a summary of important gemmology-related articles published in other journals.

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