\n \nThranduil's breastplate depicted in various adaptations of J.R.R. Tolkien's works is a prominent piece of his armor. It's described as ancient and possibly incorporating mithril. In The Battle of the Five Armies Thranduil uses this armor along with his bow while leading his Elven king army to claim the white jewels from the Dwarves. The armor is described as ancient and potentially incorporating mithril a rare and valuable metal. \n \nThranduil wears his breastplate while leading his Elven army to claim jewels from the Dwarves in The Battle of the Five Armies. The jewels, which Thranduil seeks to claim were intended for his deceased wife. In The Hobbit Thranduil offers his armor to Bilbo Baggins acknowledging his worthiness, suggesting that his armor is a mark of an elven prince. \n \n