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Suite containing over 36 carats of Yogo sapphire
Gemmological Characterisation of Sapphires from Yogo Gulch, Montana

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

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Multi-colored gems are superimposed on an image of glacier peaks.
Article
Gems and Minerals from the Sub-Arctic

Circumnavigate the boreal reaches of the globe to explore gems from polar regions.

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Hands holding sapphire
Article
Gem Fossicking: Recreational Mining in Australia

Fossicking is a special type of mining activity that Australians love. Australia is a large country rich in many gem resources. Come to Australia with the GIA field gemmology team to feel the passion of gem fossicking in the southern hemisphere.

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 Large open mussel shell with pink interior
Article
Freshwater Pearling in Tennessee

Natural pearl identification is one of the critical problems in pearl research. The DNA study of pearly molluscs and oysters facilitates the solving of this problem. To fulfil this goal, GIA sent a group from both Research and Education to Tennessee to sample the freshwater molluscs for DNA bar-coding. Come with us to Camden, Tennessee, to see how we dive for pearly shells.

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Indian necklace
Article
Jewellers to the Maharajas of Jaipur and Modern-Day Moguls

Enter a world not well-known in the West—the world of the maharajas and their jewellery, coveted by the modern-day moguls of business, entertainment and royalty. See the fantastic works of art made today in the form of enamelled Kundan meena jewellery and the regal look of polki diamonds.

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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
Emeralds: Colombia’s Buried Treasure

Colombia is home to a rainbow of gems, but emeralds – and the tales of lore that surround them – are the country’s most well-known treasures.

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Article
Summer 2015 G&G: Dual-Stars, Photomicrography Guide, Rubies from Tajikistan, New Micro-World Section

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

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GIA Team
Article
Mozambique: A Ruby Discovery for the 21st Century

Join GIA on location at the Montepuez ruby mine in Mozambique, the most important ruby discovery of this new century.

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Sri Lanka Mine to Market
Article
Sri Lanka: From Mine to Market, Part 1

Join GIA field gemmologists and witness firsthand the entire value chain of the Sri Lankan coloured gemstone and jewellery industry, from digging for sapphire in the mud to the glamour of finished jewellery on a fashion model.

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