Origins and styles
In Italy people may wear the cornicello - an amulet of good luck used for protection against the evil-eye curse. It consists of a twisted horn-shaped charm often made of gold, silver, bone, or red coral. Originally cornecelli resembled the twisted horn of an African eland, though over the years they have become stylized and less horn-like. A regionally popular amulet, they occur primarily in Italy and in America among descendents of Italian immigrants. According to some Calabrese traditions, the horn was once modeled after a chili pepper, due to its abundance in the region.
Related (or not) to the corno is the mano cornuta or "horned hand." This is an Italian hand-gesture (or an amulet imitative of the gesture) that can be used to indicate that a man has been cuckolded ("wears the horns") and also to ward off the evil eye. Mano means "hand" and corno means "horn."