Coal can be obtained from the Managing Miscellania event by having the player's subjects of Miscellania gather it for them. In order to gain coal, players must store an adequate number of coins in the coffers, and set the subjects to focus their efforts on mining. They will automatically mine coal and a few gems.
Coal is also a possible reward from Temple Trekking, and can sometimes be found inside barrels around RuneScape.
With level 29 Divination, 3 iron ore may be transmuted into a coal, consuming 2 bright energy yielding 6 Divination experience; this produces a gross profit of -988 coins.
Coal, like all other mined rocks, respawns at a rate directly proportional to the number of people in the rock's RuneScapeworld. If the world is empty, the rock respawns in 1 minute; if it is full (with 2000 players), it respawns in 30 seconds. Thus the respawn rate of coal is
The market price of coal is currently 183 coins. Coal maintained an average stable price of 175 coins prior to June 2009, but gradually rose to over 300 coins in the middle of 2010. After free trade was reinstated on 1 February2011, the price briefly fell to an average 160 coins, but continued to fluctuate near 250 coins until 2013.
A rework of Mining and Smithing was planned for September 2016, however the rework has since been postponed to 2017 due to player feedback. Coal was planned to only be required for lower tier bars; new secondary ingredients would be required for the new bars. This caused the price of coal to steadily decrease in value, maintaining a 30-day average of 178 coins during September 2016.
For players seeking profit from mining, Iron ore can be mined at a faster rate, and has a current Grand Exchange price of 331 coins; a price difference of 148 coins over coal. Because of this, many players prefer to mine iron instead.
Coal is not an ore; ore requires extraction to obtain the element, whereas coal is found in its usable form.
In RuneScape, coal rocks have a higher chance of awarding gems than other ore rocks; this is true for Earth as well, as coal beds can supply the needed carbon and pressure gems require to form.
Coal can be obtained from Mobilising Armies by exploring for treasure with dwarven squads during a round. Players may also get coal as spoils of war.
As a joke around Christmas time, some players give coal to other players saying it's because they have been very naughty this year, e.g. killing innocent guards, picking people's pockets, etc. This was turned on its head during the 2009 Christmas event, where the naughty NPC Tiny Thom was delighted to have been given a lump of coal due to its market value.
Coal rocks in the Keldagrim north-east mine have not been updated like other rocks, remaining completely black when coal can be harvested from them.
It's possible for two players to mine coal from the same rock.
The examine text states "Hmm a non-renewable energy source!"; a joke on coal in real life, as it cannot be replenished once extracted.