Alexandrite
ahd-5
noun.
A greenish chrysoberyl that appears red in artificial light, used as a gemstone.
The Century Dictionary and Cyclopedia
noun.
A variety of chrysoberyl found in the mica slate of the Ural mountains.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
A form of
chrysoberyl
that displays a colour change dependent upon the light source, along with strong
pleochroism
.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a green variety of chrysoberyl used as a gemstone
Word Usage
"This mineral furnishes us the gem, alexandrite, which is notable for its power to change in color from green in daylight to red in artificial light."