- a purple or violet quartz, used as a gem.
- a purplish tint.
- having the color of amethyst.
- containing or set with an amethyst or amethysts: an amethyst brooch.
- a purple or violet transparent variety of quartz used as a gemstone. Formula: SiO 2
- a purple variety of sapphire; oriental amethyst
- the purple colour of amethyst
