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A large red-orange crystal of wulfenite is nestled in the arms of matrix.
Article
Arizona Road Trips: Wild West Gem and Mineral Localities

Arizona’s scenic desert and mountain landscape is the perfect backdrop for a modern Wild West road trip in search of gem and mineral treasures.

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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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Faceted wurtzite
Rare Faceted Wurtzite

A stone submitted for identification is revealed to be the first wurtzite examined by the GIA lab.

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Detail of pendant elements heart and palmette shows twisted wire details (probably cast) and granulation soldered on.
Article
A New Life for Revival Jewellery Styles: Archaeological, Renaissance and Egyptian

Revival jewellery is inspired by the past – and wearing it connects us to the rich history of the beginning of civilisation.

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An early black and white photo that shows deep trenches dug into the ground in the search for diamonds. Ladders and ropes help the miners excavate and traverse the mine.
Article
Historical Reading: The Diamond Fields of South Africa: Part 1 (1868-1893)

The discovery of diamonds in South Africa in early 1867 marked the start of an historic period of diamond exploration.

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A group of rough sapphires encircle cut sapphires.
Article
Montana Yogo Sapphires’ Unique Gemmology

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

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A model holds a large cut-corner square diamond with three fingers.
Article
De Beers Ups Supply; US Federal Trade Commission Warns About ‘Eco’ Claims

DeBeers responds to fluctuations, and the FTC issues warnings on laboratory-grown diamonds. Plus: 302.37 ct Graff Lesedi La Rona is revealed.

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Article
Historical Reading: The California Gold Rush

The California gold rush − the largest gold rush in the history of the world − changed the social, economic, political and cultural history of the American West.

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Article
G. Robert Crowningshield (1919–2006)

A look back at the groundbreaking research of G. Robert Crowningshield

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Dona Dirlam
Article
Dona Dirlam

A childhood love of gems and minerals led to the transformation of GIA's library and to a lasting reputation of excellence.

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