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Two blue sapphires side by side
Article
G&G Announces Most Valuable Article Awards

G&G announces the winners of the Dr Edward J. Gübelin Most Valuable Article Awards for 2019.

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Man sits at his desk with a display stand of multiple pieces of jewelry in front of him.
Article
Alum’s Lifelong Quest: Searching for Jewellery Unicorns

Alan Nacht continues his family’s legacy - Bernard Nacht & Co. – and his quest for unforgettable jewellery.

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Article
An Unusual Pearl

An Unusual Pearl: On reviewing the images sent, it was apparent that this was going to be an interesting job.

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Article
An Imitation "Melo Pearl"

An Imitation "Melo Pearl"

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Article
Pearls with Unpleasant Odours

Pearls with Unpleasant Odours

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A diamond ring without the centre stone, which is framed by two rows of small diamonds.
Article
Jewellery Detectives: Students Search for Clues to Quality Workmanship and Longevity

GIA’s Jewellery Forensics seminar teaches students to become jewellery detectives as they assess jewellery design and engineering for quality.

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Duncan Pay
Trapiche and More...

Colombia’s unique trapiche emeralds exert a fascination for many gemmologists.

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Tucson: A Showcase of Coloured Gemstone Innovation

An overview of the Spring 2016 Gems & Gemology content.

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Garnets, Sapphires, Opals and Tarnish on High-Purity Gold

An overview of the Winter 2015 Gems & Gemology content.

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On the left is a 5.26 ct Fancy deep blue heart shape HPHT synthetic diamond. On the right is a 5.27 ct Fancy deep blue emerald cut HPHT synthetic diamonds.
Article
The Latest on Synthetic Diamonds

Dr James Shigley, GIA distinguished research fellow, is one of the foremost experts in diamonds and their identification. In this presentation recorded at the 2017 JCK Las Vegas show, he shares the latest developments about HPHT and CVD synthetic diamond

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