Luminite

Luminite is a Hardmode ore dropped exclusively by the Moon Lord in stacks of 70–90. It can be used to craft Luminite Bars, which can then be used to craft several end-game items, like the Solar, Nebula, Vortex, and Stardust tools and armor.

Crafting all items requires 1,268 Luminite, which requires defeating Moon Lord 15–19 / times.

Trivia

 * In contrast to most ores, its bars are not crafted at a Furnace or Forge, and it is not detected by Spelunker Potion, the Magic Lantern, Metal Detector, or Suspicious Looking Tentacle. It also does not have a specific associated armor set or sword, does not have an alternative ore, and despite being an endgame ore, it can be mined with any tier of Pickaxe.
 * Luminite is referred to as "Lunar Ore" in the game's source code.
 * Wings made from Luminite are the only craftable wings that do not require Souls of Flight.

History
Luminit Luminite 루미나이트 Luminite Люминит 夜明矿