Celestial bronze

Celestial bronze is a powerful, special metal made mostly by the cyclops' forges and Hephaestus. It is a substance that is deadly to all godly material. It will kill a monster usually on contact, turning to a cloud of dust, so it is commonly used to make weapons for demigods. Exceptions to these are large monsters such as Polyphemus, the huge Cyclops in The Sea of Monsters.

Celestial bronze weapons will not harm mortals, as they are 'not important enough' to be harmed by them. Celestial bronze is forged in the heart of Mount Etna and cooled in the River Lethe. Demigods and gods favor celestial bronze weapons because they are able to wound immortals, monsters, and creatures of the underworld, but cannot harm mortals- it will pass through them like an illusion, whereas mundane iron or steel weapons bounce off of most magical beings uselessly. Demigods, being half god and half mortal, can be affected by either celestial or normal weapons. Celestial bronze is also used in god armor and most likely demigod armor.

Notable Use

 * Riptide is Percy's Celestial bronze sword.
 * Annabeth has a Celestial bronze knife.
 * Zeus' Master bolt is a cylinder of high-grade Celestial bronze.
 * Colchis Bulls are forged from Celestial bronze.
 * Frederick Chase, Annabeth's father, melted down her old weapons that she left in her room and forged them into machine gun bullets for his Sopwith Camel bi-plane, which he used to kill monsters, buying time for Percy and his friends to escape during The Titan's Curse.



Trivia

 * Stygian iron is very similar to Celestial bronze, but it is mostly used by children of Hades, because it is made from the River Styx. Nico di Angelo has a Stygian iron sword.