Iridium Ore is a crafting material added by IndustrialCraft2.
This ore can be found in dungeon chests and similar, it can be created using UU-Matter from a Mass Fabricator. Iridium Ore can be used to make Iridium Plates and Iridium Ingots.
Iridium Ore is most often used to make Iridium Plates, which are in turn used to craft Quantum Armor and several items in the GraviSuite and Industrial Craft 2 mods, such as the Vajra and the Cooling Cores for the Gravitation Engines. Iridium Ore can also be compressed into Iridium Ingots for use in Hybrid Solar Panels.