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GIA field expedition team in Ethiopia
Land of Origins: A Gemological Expedition to Ethiopia

Documents a visit to the sapphire, opal, and emerald mining and trading areas of Ethiopia.

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A bright orange, multi-faceted gem.
Article
Fall for Autumn Gems

Nature gives us a brilliant palette of color-changing leaves and a spectacular kaleidoscope of colorful sunsets during the fall season.

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A round, bright red gem displayed on a dark gray background.
Article
The Red Hot Gems of Summer

These red, pink and orange hued gems evoke passion and excitement – and are surefire accessories for sultry summer days.

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A view from behind of a bejeweled winged insect.
Article
A Glittering Garden: A Menagerie of Designs from Mother Nature

Delightful garden creatures and flowers are favorite subjects that transform beautifully into Victorian, Art Nouveau and modern jewelry designs.

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Bursts of yellow and purple radiate throughout this round cut amertrine.
Article
Colorblocking: The Art and Fashion of Multicolor Gemstones

The fashion trend of colorblocking can be found in the artistic combinations of color in multicolor gemstones known for their color zoning or banding.

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Spinel’s visible spectrum
New Deposit of Black Opal from Ethiopia

The Stayish mine in Ethiopia’s Wollo province has been producing black opal since 2013.

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Boulder opal with layer of lepidocrocite inclusions
Lepidocrocite in Boulder Opal

A boulder opal contained an unusual carpet of needle-like lepidocrocite inclusions along the interface between the opal and the ironstone matrix.

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Gem-quality common opal from Mexico.
New Deposits of Gem-Quality Common Opal from Michoacán, Mexico

Material from a new opal deposit in Morelia, Mexico is examined.

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Remedios, home of rutilated quartz mining community.
Golden Rutilated Quartz Artisanal Mining Community

Plans to develop a collective in a remote Brazilian rutilated quartz mining community are unveiled.

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Color bars on top and sides of 3,019 ct rough opal
The Challenges of Cutting a Large Gem Opal Rough

A first-person account of cutting a 3,019 ct piece of white opal to create a 1,040 ct gem with play-of-color across the surface.

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