New Gems & Gemology Issue

Yellow and Orange Diamonds, New Identification Techniques, and more...

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WATCH VIDEO

October Birthstone

Opal: The Gem that Contains Worlds

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: Courtesy: Rod Griffin, Australian Opal, Silverado, CA
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Research & News

Electric blue 5.61 ct hemimorphite.
Lab Notes

Hemimorphite Resembling Paraíba Tourmaline

Copper in the zinc silicate known as hemimorphite creates an electric blue color similar to that of Paraíba tourmaline.
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Knowledge Session Webinars
Webinar Series

GIA Knowledge Sessions

Engage in webinars on the most diverse and pressing issues in gemology today, including gemstone origin, laboratory-grown stones and new discoveries in field gemology.
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Teal blue and purple bicolor synthetic sapphire.
Gem News International

Bicolor Synthetic Sapphire

RusGems creates striking synthetic bicolor gems using the flame-fusion technique.
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White bavenite needles in quartz.
Micro-world

Bavenite in Quartz

Faceted quartz contains numerous unusual white radial inclusions identified as bavenite.
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Carved Fancy Dark gray diamond ring.
Lab Notes

Solid Carved Dark Gray Diamond Ring

Graphite needles create the dark gray color of a most unusual solid diamond ring carved from Canadian rough.
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Large rough spodumene crystal exhibiting pleochroism.
Gem News International

The “Fragility of the Eternal” Kunzite: Origin, Cutting, and Identification

A master gem carver bases his latest design off a stunning stained glass window when attempting the world’s largest known cut kunzite.
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Gems & Gemology
This Month's

Featured Gems

Featured Gem Peridot
Peridot

Found in lava, meteorites, and deep in the earth’s mantle, yellow-green peridot is the extreme gem.
Fancy Color Diamond
Fancy Color Diamond

Dazzling brilliance. Captivating color. These are the planet’s most valued gems.
Diamond
Diamond

Diamonds are among nature’s most precious and beautiful creations.
Emerald Bluish Green Stone
Emerald

Emerald is the bluish green to green variety of beryl, a mineral species that includes aquamarine.
Featured Gem Citrine
Citrine

Citrine is the transparent, pale yellow to brownish orange variety of quartz.

View the Gem Encyclopedia

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