also: アレクサンドライト
noun
alexandrite
A rare color-changing variety of chrysoberyl gemstone, appearing green in daylight and red in incandescent light.
アレキサンドライトは光の種類によって色が変わる宝石です。
Alexandrite is a gemstone that changes color depending on the type of light.
Standard katakana spelling; the most common form.
Alternate katakana spelling; less common but still used.
From English 'alexandrite', named after Tsar Alexander II of Russia.