Mithril ore

Mithril ore is unrefined mithril metal. A player with a Mining level of 55 or higher can mine mithril ore from rocks found at various mines, granting 80 Mining experience for each ore mined. A player with a Smithing level of 50 or higher can smelt mithril ore into mithril bars by using it on a furnace along with 4 coals, granting 30 Smithing experience. However, it can also be smithed with Magic without a furnace. The Superheat Item spell will smelt mithril ore into mithril bars if the caster has level 50 Smithing and level 43 Magic, along with the required ores. Casting Superheat Item gives 53 Magic experience.

Locations
Mithril rocks can be found in many mines, including:
 * In the Dwarven Mines (near the scorpions and king scorpions) - 2 rocks
 * The Mining Guild (connects to the Dwarven Mines) - 5 rocks
 * The Hobgoblin Mine
 * Crandor Island
 * Southwest of the Lumbridge Swamp - 5 rocks
 * Al Kharid Mine - 2 rocks
 * Mine under Grand Tree in Tree Gnome Stronghold - 2 rocks
 * Jatizso Mines
 * A small mine outside of Keldagrim, east of Rellekka in Fremennik Province
 * At least one rock is located at the south-east corner of the Fight Arena, south-west of Port Khazard

Trivia
When RuneScape was first released, smelting mithril bars required level 55 Smithing. Jagex later redefined the smithing table such that smelting mithril bars only required level 50 Smithing. Before the change, Dmonik was the first known player to be able to mine and smith mithril bars.