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.

One of the best ways to mine coal is to use skills necklace teleport to mining guild, and bank using either the TokKul-Zo or the Ring Of Duelling. Having a coal bag from dungeoneering rewards will hold 81 coal for you making your trips longer.

Free

 * Mining Guild - 37 rocks
 * South-Western Wilderness mining site - 34 rocks
 * 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
 * North Edgeville mining site / Southern Wilderness mining site - 3 rocks
 * South Crandor mining site - 3 rocks
 * Al Kharid mining site - 2 rocks
 * Falador mining site - 2 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
 * 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
 * South-east Ardougne mining site - 4 rocks
 * Fight Arena mining site - 1 rock
 * Karamja mining site - 1 rock
 * Prifddinas - 8 rocks

Respawn rate
Coal, like all other mined rocks, respawns at a rate indirectly 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