amethyst /ˈæm.ə.θɪst/noun 3adjective 1forms 3 noun3 •A transparent purple to violet variety of quartz with traces of manganese, used as a gemstone.I'm not bragging, but I had mica, pyrite, and an amethyst in my collection, oh yea. (Side note to readers: Amethysts, those big purple crystal ones, were a big panty dropper back in the day. […]) — 2015 •A purple colour. •The tincture purpure, when blazoning by precious stones.The Field is Topaz, a Lion rampant Amethyst [...] — 1726 adjective1 •Having a colour similar to that of the gemstone formsamethysts · more amethyst · most amethyst