Alexandrite effect
A reversible change of perceived colour with the light source, caused by the overlap of a stone's absorption bands with the illuminant's spectrum. Named for the chrysoberyl variety alexandrite; also shown by colour-change diaspore.
A reversible change of perceived colour with the light source, caused by the overlap of a stone's absorption bands with the illuminant's spectrum. Named for the chrysoberyl variety alexandrite; also shown by colour-change diaspore.
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