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IMG - The New App Means Business

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August 2022 Birthstone Peridot

August Birthstone

Peridot: The Gem of the Sun

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2022 eLearning Landing Page

Education

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New Gems & Gemology Issue

German Topaz, Emerald from Habachtal Part II, and 2022 Tucson Report

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featured

Research & News

Examples include unheated brown specimens, heated rough material, and faceted stones.
Gem News International

Blue Zircon Reportedly from Malawi

A reported new source of blue zircon in Malawi yields rough material for beautiful finished stones in the gem trade.
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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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Small trigons and a rough surface texture seen on a chondrodite crystal.
Micro-World

Chondrodite in Red Spinel from Mogok, Myanmar

The Bangkok lab recently encountered a single round crystal of chondrodite in red spinel, a possible indicator of Burmese origin.
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Diamond (left) and emerald (right) lenses.
Lab Notes

Two Antique Mughal Spectacles with Gemstone Lenses

Unique diamond and emerald-lensed spectacles from the Mughal Empire were tested in GIA’s New York laboratory.
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“Healing Sisters” rings featuring amethyst and peridot.
Colored Stones Unearthed

Colored Stones from the Deep

The first installment of this column discusses the formation of colored stones from the crust-mantle transition and below.
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A 2.42 ct green diamond treated by radioactive salts.
Micro-World

Radioactive Green Diamond

The Carlsbad lab recently encountered a 2.42 ct green diamond showing signs of radiation treatment by the use of radioactive salts.
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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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