Purple gemstone, historically Asian origin.

Laccaria amethystina, a small brightly-coloured edible mushroom.

The Amethyst incident, also known as the Yangtze incident''', was a historic event that occurred on the Yangtze River for three months in the summer of 1949, during the late phase of the Chinese Civil War.

The amethyst woodstar (Calliphlox amethystina) is a species of hummingbird in tribe Mellisugini of subfamily Trochilinae, the "bee hummingbirds".