An amethyst stone is a type of gem which is soft and always violet in appearance. It costs 600 zorkmids.

Dipping an amethyst in a potion of booze will turn it into a potion of fruit juice; this is because the name comes from the Greek a (“not”) and methuskein (“to intoxicate”), a reference to the belief that the stone protected its owner from drunkenness.

Each version of Mine's End contains an amethyst.

It can be used to distinguish see invisible and fruit juice