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Definition of Alexandrite

Babylon English

type of stone used in jewelry
Alexandrite Definition from Arts & Humanities Dictionaries & Glossaries
Antiques World Dictionary of Antique & Estate Jewelry
Discovered in 1830 in Russia, and named after Czar Alexander II of who was then Crown Prince of Russia, alexandrite is a form of the mineral chrysoberyl noted for its color change in different forms of light. In sunlight alexandrite looks blue-green, but in indoor (tungsten) light it the same stone changes to reddish-purple. Natural alexandrite with good color is very expensive today, as very little is still being mined, and there are many synthetics on the market. Synthetic color-change sapphire is also sometimes mistaken for alexandrite.
Alexandrite Definition from Language, Idioms & Slang Dictionaries & Glossaries
WordNet 2.0

Noun
1. a green variety of chrysoberyl used as a gemstone
(hypernym) chrysoberyl