Idiotita

Idiotita (ιδιότητα, Idióti̱ta) was a Sword crafted by Zagreus from the power of the Protogenoi Gaea and given to his new Lord of the South, the God Zelus, who served as one of his most loyal servants and protector.

As it is linked to Keraunos, the sword wielded by Zagreus, it is implied that Idiotita and its siblings are made of the Diamond-like Adamant material found in the Heavens. Idiotita itself seems to be made of a large emerald-like material, and its hilt has four shaped emeralds in it.

Trivia

 * Idiotita in Greek means "Property", but it can also mean: "capacity", "quality", "nature", "faculty" and "rating".