amethyst
Concise Oxford English Dictionary © 2008 Oxford University Press:
amethyst /ˈaməθɪst/
▶noun a precious stone consisting of a violet or purple variety of quartz.
– derivatives
amethystine /-ˈθɪstiːn/ adjective.
amethystine /-ˈθɪstiːn/ adjective.
– origin ME: via OFr. from L. amethystus, from Gk amethustos ‘not drunken’ (because the stone was believed to prevent intoxication).
'amethyst' also found in these Oxford entries:
