The Metal Islands form an island sub-group of the Southern Arc Islands, in the southern half of the nations. It contains four islands, one smaller than the others. The large islands are, from northeast to southwest, Copper Island, Silver Island and Gold Island. Iron Island lies just off the western shore of Silver Island. The southern three islands are named after resources found on them, with Copper Island being named for its appearance (there are many brown cliffs on its shores). Silver Island has the nation's only functional, official mines, though Gold Island and Iron Island have no-longer-functional ones.