alexandrite

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.