Source : Webster's Revised Unabridged Dictionary (1913)

Amethystine \Am`e*thys"tine\, a. [L. amethystinus, Gr. ?.]
   1. Resembling amethyst, especially in color; bluish violet.

   2. Composed of, or containing, amethyst.

Source : WordNet®

amethystine
     adj : containing or resembling amethyst