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Ametrine
This transparent quartz has colors of both amethyst and citrine, and is called ametrine or amethyst-citrine.
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See Gem As
Tools
◂ BACK TO GEM ENCYCLOPEDIA
Ametrine
This transparent quartz has colors of both amethyst and citrine, and is called ametrine or amethyst-citrine.
See Gem As
Tools
G&G In a Flash: Nature’s Diamond Sculptures
Explore nature’s diamond sculptures—264 rare rough diamonds examined by GIA scientists for their unique shapes and raw brilliance.
G&G in a Flash: Guide to Phenomenal Gems
Phenomenal gemstones dazzle with unique optical effects like iridescence and play-of-color. Discover how your favorite gem phenomena actually work.
My First Article
Temples and Treasures of Southern Asia: A GIA Museum Exhibit
A photo tour of the GIA Museum’s latest exhibit featuring extraordinary crystals and gems central to the cultures of southern Asia.
Converge 2025 GIA Hands-On Sessions
GIA offered a variety of hands-on sessions for attendees during the Converge conference.
Converge 2025 Poster Presentations
An overview of more than 30 posters presented at the Converge conference.
Characterization of Emeralds from Zhen’an County in Shaanxi, China
Presents a comprehensive analysis of the gemological, spectroscopic, and trace element characteristics of a set of Shaanxi emerald samples based on standard and advanced gemological methods.
Al Gilbertson Receives Robert M. Shipley Award
GIA’s Al Gilbertson receives the American Gem Society’s highest honor.
The Diversity of Gemstone Deposits
Investigates deposits known for producing multiple gemstone species and the conditions that create their distinct geological settings.
