Coal rocks

A Coal rock is a rock that contains coal. Players with a Mining level of 30 can mine coal rocks with a pickaxe, granting 50 Mining experience. Coal rocks can be found in numerous mines throughout RuneScape, most abundantly in the Mining Guild.

On rare occasions the rock may give an uncut sapphire, emerald, ruby or diamond.

Coal is used in combination with ores such as iron, mithril, adamantite and runite to smelt bars in a furnace to create armour and weapons with Smithing.

Examine: This rock contains coal.

Locations
Coal rocks can be found in many mines:

Free

 * Mining Guild - 37 rocks
 * Southern wilderness mining site - 34 rocks (the most in a single area)
 * Bandit camp mining site - 20 rocks
 * Dwarven Mine resource dungeon - 13 rocks
 * Dwarven Mine - 11 rocks
 * North Crandor mining site - 7 rocks
 * West Lumbridge Swamp mining site - 7 rocks
 * Edgeville dungeon mine - 6 rocks
 * Barbarian Village mining site - 4 rocks
 * Al Kharid mining site - 2 rocks
 * North Edgeville mining site - 3 rocks

Members

 * Abandoned Mine - 26 rocks
 * Coal Trucks - 18 rocks
 * Legends' Guild mining site - 13 rocks
 * Grand Tree mine - 11 rocks (close to Grand Tree bank)
 * Heroes' Guild mine - 11 rocks
 * Keldagrim north-east mine - 9 rocks
 * Jatizso mine - 8 rocks
 * TzHaar mine - 8 rocks
 * Keldagrim entrance mining site - 7 rocks
 * Central Fremennik Isles mining site - 7 rocks
 * Rellekka mining site - 7 rocks
 * Ardougne sewers mine - 5 rocks
 * Keldagrim south-west mine - 5 rocks
 * South-east Ardougne mining site - 4 rocks
 * Desert Mining Camp surface mining site - 4 rocks
 * Evil Chicken's Lair mine - 4 rocks
 * Miscellania & Etceteria Dungeon Mine - 4 rocks
 * Pirates' Hideout mining site - 4 rocks
 * Falador mining site - 2 rocks
 * Karamja mining site - 1 rock
 * Fight Arena mining site - 1 rock

Respawn rate
Coal, like all other mined rocks, respawns at a rate directly proportional to the number of people in the rock's RuneScape world. If the world is empty, the ore respawns in 1 minute; if it is full (with 2000 players), it respawns in 30 seconds. Thus the respawn rate of coal is
 * $$60-\frac{3x}{200}$$ seconds,

where x is the number of players in the world.

A table of respawn rates is given below.

Coal rock Coal rock Coal rock