Amastra violacea is a species of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Amastridae.

Thetypical form is well characterized by its violaceous hue with light striae, a purplish apex, and yellowish earliest neanic whorls, with a purple interior.

In some cases, the shell surface appears more worn and adopts a nearly uniform flesh tone, with the apex becoming nearly white.

Fragments of the thin brown cuticle may persist, and when preserved on the spire, reveal irregular dark markings on a lighter background, indicating a relationship to A. nubilosa.

The second whorl features rather strong, arcuate ribs, which are broader than their intervals and often split or weaken near the lower suture.