Alexandrite

//ˌæl.ɪɡˈzæn.dɹaɪt// noun

Definitions

Noun
  1. 1
    A form of chrysoberyl that displays a colour change dependent upon the light source, along with strong pleochroism. countable, uncountable

    "[…] the body of each high seat was a single jewel of monstrous size: the left-hand seat a black opal, asparkle with steel-blue fire, the next a fire-opal, as it were a burning coal, the third seat an alexandrite, purple like wine by night but deep sea-green by day."

  2. 2
    a green variety of chrysoberyl used as a gemstone wordnet

Etymology

Named after Alexander II of Russia + -ite.

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