Noirium

Noirium is a synthetic metallic ore with the symbol No, developed and produced by the Mikaeans throughout the Milky Way Galaxy. The metal is used in the construction of all buildings and structures in use by the Mikaeans, from their massive arcologies to their voidships, right down to the armor used by the Obsidian Guard. Noirium can even be found as the primary substance Mikaean skeletons, giving them their great strength and physical endurance. The durability and effectiveness of noirium is a testament to the ingenuity of the Mikaeans' intelligentsia caste, which created the synthetic material early on in the history of the species. To date, only the Mikaeans have access to noirium, no doubt given the lack of other intelligent species in the known galaxy.