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Definition of alexandrite effect

The property of some chrysoberyl and other minerals and stones to appear green in sunlight, but red under incandescent illumination.


References:

Yan Liu, James Shigley, Emmanuel Fritsch and Scott Hemphill (1994): The “alexandrite effect” in gemstones. Color Research & Application 19, 186–191.

https://en.wikipedia.org/wiki/Chrysoberyl#Alexandrite

https://www.gia.edu/alexandrite-quality-factor


Mineral and/or Locality  
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