Mithral

Mithral, also known as mithril, is a precious metal produced from ore found in mountain ranges in certain areas of Faerûn and in the Underdark. Mithral is produced through a process similar to that of steel smelting. Items cast from mithral weigh only half as much as similar items forged from steel. Since pieces of armor made from this valuable metal are very light, they allow the wearer to make better use of their natural agility and are less restrictive on spellcasting.

For a list of mithral items, see: Category: Mithral items.