Coal is an ore that can be acquired using the Mining skill. It requires level 30 to mine. Coal can be combined with other ores in a furnace to create different types of bars.
|Coal needed||Ore needed||Bar created|
|2||1 Iron ore||Steel bar|
|4||1 Mithril ore||Mithril bar|
|6||1 Adamant ore||Adamant bar|
|8||1 Runite ore||Rune bar|
. It is used in many quests.