Coleophora amethystinella is a moth of the Coleophoridae family. It is found in the Mediterranean region from Portugal to Iraq. It has also been recorded from Great Britain. The species was previously considered to be a synonym of Coleophora fuscicornis. The length of the forewings is 7-8.5 mm for males and 6.5–7 mm for females. Adults are dark glossy green, with conspicuous orange eyelashes. Adults are on wing in June in western Europe. The larvae feed on Vicia tetrasperma. They feed within the seedpods of their host plant, living within a movable case with a length of 9–11 mm.