Metal dragons

Metal dragons are dragons whose hides are metallic. They are the strongest type of dragon and have extremely high defence to melee attacks. Like metal armour however, they are very weak to magic attacks. Instead of Dragonhide, the metal dragons drop bars of their type of metal. Metal dragons are unlike Chromatic dragons in that their fire breath is a ranged attack. Because of this, they will not move into melee range, allowing players to fully protect themselves from Dragonfire with a combination of antifire potions and Anti-dragon shield or Super antifire potions and stay out of melee range, minimising how much they are hit, and in most cases completely immunizing themselves from damage. All metal dragons except Bronze dragons have a chance of dropping the Draconic visage, and all metal dragons except Mithril dragons can drop Dragon platelegs and Dragon plateskirts.

Trivia

 * According to Mod Mark in the 17 February 2012 Q&A, adamant dragons are planned to be added in the future..