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Magical Metals (also called Blessed Metals) are metals that can be used by Greek and Roman Demigods and immortals to fight against monsters and other evil creatures, as well as gods and other demigods. The Greek Gods and demigods use Celestial Bronze, while the Roman Gods and their children use Imperial Gold. Hades, those who live in the Underworld, and some of his children (like Nico di Angelo) use Stygian Iron. Sometimes, Adamantine is also used by the gods. Demigods use weapons made of these metals because these metals are the only metals by which a monster can be harmed.

Celestial Bronze

Main article: Celestial Bronze Celestial Bronze is mined from Mount Olympus, then forged by the Cyclopes, tempered in the heart of Mount Etna, and cooled in the River Lethe. The metal does not harm mortals, considering them not important enough to injure, but is strong enough to cut through a steel door. It is also been mentioned that this metal glows when in weapon form. It can also be melted down to make other weapons, such as bullets, as seen in The Titan's Curse. However, bullets made from magical metals can only be used once, for they immediately disintegrate afterward.

Notable Celestial Bronze Weapons

Imperial Gold

Main article: Imperial Gold
Ivlivs

Ivlivs

It is unknown where Imperial Gold is mined from, but it is said to be consecrated in the Temple of Jupiter on Capitoline Hill in Rome, as stated by Midas in The Lost Hero, and forged at the Temple of Jupiter at Camp Jupiter. The metal is extremely rare, but very powerful. It is also quite volatile. It is also thought that because of the blessing of Jupiter these weapons are more effective against venti. This metal is favored by Roman Demigods. Whether the Roman aspect of the Gods carry weapons made of Imperial Gold or Celestial Bronze is unknown.

Notable Imperial Gold Weapons

Stygian Iron

Main article: Stygian iron A metal rarer than both Celestial Bronze or Imperial Gold. It's forged in the Underworld and cooled in the River Styx. It is possible that only people or beings of the Underworld can wield this metal (Hades, his children, and other beings that live in or are associated with the Underworld). Where weapons made from the other Blessed Metals cause monsters to disintegrate, Stygian Iron absorbs their essence, causing them to either not being able to reform ever again or take a longer time to reform. Like Backbiter, it can also harm mortals. Like Celestial Bronze, it also gives off a faint light, which is dark purple in color.

Notable Stygian Iron Weapons

Silver

Although silver is not regarded as a magical metal, it is considered sacred to Artemis (and used by the Hunters of Artemis) and is the only known weapon able to harm lycanthropes (werewolves). It is unknown whether Stygian Iron can also harm them, because, although as a metal of the Underworld it should work against all monsters, demigods, gods, and mortals, Nico was discouraged from using it against Lycaon.

SilverUSGOV

The metal silver

Notable Silver Weapons

Bone Steel

Bone steel is an enchanted metal used by Norse gods and their offspring. Made by having iron smelted with bones and quenched in blood to harden it. If forged correctly, it can cut down supernatural creatures, even giants and gods.

Notable Bone Steel Weapons

Meteoric Iron

A metal used by Egyptian forgers and it is unknown if it is magical.

Notable Meteoric Iron Weapons

Adamantine

Described as a super strong metal, Adamantine glitters translucent white, sort of like a cross of silver and diamonds. Adamantine was used when Hephaestus made Hera's throne. Curiously, most of the weapons made out adamantine that appeared in the series have Imperial Gold in they too.

Notable Adamantine Weapons

  • Perseus's sickle (half Adamantine, half Imperial Gold)
  • Hermes's Sword (half Adamantine, half Imperial Gold)
  • Kronos' Scythe (according to some myths)

Items
Personal Weapons: Riptide | Annabeth's Knife | Backbiter | Frank's Spear | Hazel's Spatha | Katoptris | Nico's Sword | Thalia's Spear | Aegis | Maimer | Kronos' Scythe | Ivlivs | Master Bolt | Poseidon's Trident | Sword of Hades | Reyna's Spear | Hades' Staff | Juno's Gladius | Annabeth's Sword | Sumarbrander | Gungnir | Gjallar | Mjølnir | Thor's Staff | Khopesh | Mallory's Serrated Knife | Meg's Twin Imperial Gold siccae blades | Caduceus | Apollo's Golden Bow | Artemis' Knives | Ares' Sword | Ares' Shield | Thyrsus | Hecate's Torches | Minotaur's Axe | Leroy's Sword | Tyson's Javelin
Magical Items: Annabeth's Yankees Cap | Helm of Darkness | Keys of Hades | Flying Chariot | Golden Apple | Apples of Immortality | Greek Fire | Hermes' Multivitamins | Leo's Magical Toolbelt | Nectar and Ambrosia | Pandora's Pithos | Winged Shoes | The Golden Fleece | Stygian Ice Whistle | Arrow of Dodona | Serapis' Staff | Magic 8 Ball | Arrow of Dodona | Pig Ball | Mechanical Spider | Angel Statues | Athena Parthenos | Chiron's Wheelchair | Diocletian's Scepter | Flaming Dodgeball | Gleipnir | Poseidon's Pearls | Queen Hippolyta's Belt
Spoils of War: The Minotaur's Horn | Medusa's Head | Kampê's Scimitars | Nemean Lion's Pelt | Gorgon Blood | Cornucopia | Lydian Drakon Hide | Phineas' Robe and Slippers
Items: Camp Necklace | Chameleon Armor | Daedalus' Laptop | Golden drachma | Denarius | Red Gold | Mark of Athena | The Pax | Video Shield | Wristwatch Shield | Golden Mango | Sibylline Books | Pillow Pet
Blessed Metals: Celestial Bronze | Imperial Gold | Stygian Iron | Bone Steel