A Mithril bar is a bar of refined mithril ore. It can be created through the Smithing skill by using a mithril ore and 4 pieces of coal on a furnace, granting 30 experience. The Superheat Item spell can also be used to make mithril bars. Both ways of creating mithril bars require level 50 Smithing. It can also be created in the Blast Furnace, which can be considerably cheaper as it halves the amount of coal needed.
A mithril bar can be smithed on an anvil by using the Smithing skill to create mithril weapons and armour, granting 50 Smithing experience per bar used. A list of mithril items that can be smithed from mithril bars and the Smithing levels required can be found at Smithing tables.
Currently, smelting a mithril bar yields a profit of 190 in a standard furnace and 508 in the blast furnace.
Mithril was used as one of the tiers of post count badges on the official Runescape Forums. Players needed to have made 1,000 posts to be given the mithril badge.