Cicatriz de Hierro (English: Scar of Iron) is a city on Mercury run by Spain. The city is named for the shape of the mine created when colonization of the planet started, resembling a massive scar in the landscape. The city itself was founded in 1954 as a penal colony for Basque separatists. The colony was opened to civilians in 1957.
Cicatriz de Hierro competes with the German colony of Neuen Rammelsberg in total ore exported to the rest of the solar system. Zheronian companies, including the Zheronian Ore Conglomerate, purchase ores from Cicatriz de Hierro. This has made Spain a major player in Mercurian ore exports.