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A notebook, pen, mobile phone with compass app and a digital camera sit on top of a map.
Article
The Stories Behind the Photos: A Gigantic Aquamarine and ‘Gaudy’ Nature

Gemmological photojournalist Robert Weldon shares the stories behind some of his favourite photos.

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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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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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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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Tucson: A Showcase of Coloured Gemstone Innovation

An overview of the Spring 2016 Gems & Gemology content.

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Article
Pyrope Garnet and Montana Sapphires Highlight Winter 2015 G&G

G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.

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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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Duncan Pay
Trapiche and More...

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

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CVD film on 0.27 ct diamond
Long-Term Durability of CVD Synthetic Film on Natural Diamond

A natural diamond with a CVD synthetic film is examined at GIA's Carlsbad lab.

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