Alum was a mineral used to create Mandalorian armor. It was a double sulfate composed of a trivalent metal, aluminium, and a univalent metal, potassium or sodium, used as either a clarifying agent or a hardening agent. Overexposure to fumes could lead to alum mineral sickness, a common affliction of alum miners such as Haldo. During the Galactic Civil War, members of the Mandalorian Death Watch led by Overlord Teti Viba excavated a vast network of alum mines located beneath their bunker on the forest moon of Endor. Some time around 1.5 ABY, a group of spacers defeated the Death Watch and went on to use alum to create Mandalorian Armor.

AppearancesEdit

•  Star Wars Galaxies: An Empire Divided (First appearance)