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A large group of people outside on GIA’s Carlsbad, California  campus.
Article
Guardians of Trust: GIA’s Innovative Research, Instruments and Services

GIA’s services and instruments have grown in importance and impact as new gem treatments and laboratory-grown gems have entered the market.

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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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Three cultured pearls, one natural
Real-Time Microradiography of Pearls: A Comparison Between Detectors

Compares the image quality provided by real-time microradiographic imaging (RTX) units fitted with two different detectors: an image intensifier (II) and a flat panel detector (FPD).

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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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Article
Jaipur, India: The Emerald Cutting and Trading Powerhouse

Jaipur, India, is a leading emerald cutting and trading centre for the global gem and jewellery industry. See inside the industry with a GIA field team, and learn the intricacies of a business seldom seen by the public or most members of the industry.

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Article
Searching for Emeralds in Afghanistan

GIA field gemmologists are a different breed. When Andy Lucas, GIA manager of Field Gemmology in Carlsbad, decided to take some holiday time, he didn’t make for the usual destinations. No beaches, ski resorts or cosmopolitan cities. Lucas instead headed off to Afghanistan, lured by deposits of fine emeralds.

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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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Article
Sapphire Series Part 3: Modern Synthetic Sapphire Applications

The third in the series, "Sapphire: A Crystal With Many Facets," this article looks at various emerging applications for synthetic sapphire.

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Article
Sapphire Series Part 2: The Next Generation of Sapphire Crystal Growth Techniques

The second in the series, "Sapphire: A Crystal With Many Facets," this article looks at several advanced growth techniques.

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Optimising Face-Up Appearance in Coloured Gemstone Faceting

How contrast patterns can increase perceived brightness and optimise a gemstone's appearance.

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