alexandrite

/al-ig-zan-drahyt, -zahn-/US // ˌæl ɪgˈzæn draɪt, -ˈzɑn- //UK // (ˌælɪɡˈzændraɪt) //

亚历山大,紫晶石,亚历山大石,变石

Definitions

n.名词 noun

1
Mineralogy.
- : a variety of chrysoberyl, green by daylight and red-violet by artificial light, used as a gem.

Specimens of the Alexandrite, named after Alexander I., are also to be seen here in beautiful form and clearness.
I think I'll send that Alexandrite as a sort of peace offering.
Chrysoberyl (alexandrite and also the greenish-yellow chrysoberyl).
This species furnishes us Alexandrite, chrysoberyl cat's-eye and less valuable chrysoberyls of yellowish-green color.
For an example of a remarkable change of this character, see Alexandrite.