Alexandrite
Green in sunlight. Red in lamplight. Color-changing alexandrite is nature’s magic trick.


An overview of the geographic origin complexities facing the gem and jewelry industry today.
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The geographic source of this rare color-change gem has a significant impact on value. Trace element chemistry profiles allow GIA to accurately determine origin for alexandrite from several countries.
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With more than 90 field expeditions on six continents since 2008, GIA has accumulated over 22,000 colored stone reference samples. This extensive collection of colored stones with known origins supports GIA’s research on geographic origin determination.
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GIA’s services and instruments have grown in importance and impact as new gem treatments and laboratory-grown gems enter the market.
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Shows how alexandrite’s color and color change are affected by cut and the orientation of table facets.
Read MoreExamination of a chatoyant alexandrite cabochon.
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Exceptional gems that are recirculated in the gem market make an impact at the Tucson shows.
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Learn how the structure, inclusions and properties of some gemstones interact with light to create unusual visual effects.
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All jewelry professionals are familiar with the city of Shenzhen, a global jewelry manufacturing center and a leader of China’s fast-growing gem and jewelry industry. Join the GIA team as we tour the city and discover more about its leading jewelry brands.
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Green gemstones, which can uplift and heal our spirits, have been popular gem choices ever since we began to adorn ourselves with jewelry.
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