gemstone
Alexandrite
Chrysoberyl (BeAl2O4)
AI-generated identification · may be incorrectHardness of 8.5 on the Mohs scale, notable color-change property appearing green in daylight and red in incandescent light, vitreous luster, and an orthorhombic crystal system.
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Physical properties
Hardness of 8.5 on the Mohs scale, notable color-change property appearing green in daylight and red in incandescent light, vitreous luster, and an orthorhombic crystal system.
Formation & geological history
Formed in metamorphic environments where pegmatites interact with chromium-rich ultramafic rocks, typically in high-temperature geological settings.
Uses & applications
Used primarily as a rare and precious gemstone in high-end jewelry and as a prized collector specimen.
Geological facts
First discovered in Russia's Ural Mountains in 1830, it was named in honor of Tsar Alexander II and is famous for its dramatic color change.
Field identification & locations
Identified by its exceptional hardness, specific density, and characteristic dichroic color shift under different lighting conditions. Sourced famously from Russia, Brazil, and Sri Lanka.
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