The Mineral Sea is best known for the high concentration of metals and other natural minerals in its waters that originate from the nearby landmasses and undersea vents. Almost completely enclosed from the rest of Illuria's oceans and seas by the Iron Archipelago, the cutoff from ordinary seawater has allowed a buildup of mineral rich water, allowing the creatures living there to develop many strange and unusual ways of using the Mineral Sea's plentiful bounty. The Acidians consider this area sacred.