Concentrated coal deposit

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Concentrated coal deposits are clumps of coal located in the Living Rock Caverns beneath the Dwarven Mines. They require level 70 Mining to mine, have a durability of 500, a hardness of 140, and an experience multiplier of 0.8. There are 8 of these deposits in the caverns. Concentrated coal deposits contain a much larger supply of coal than a normal coal rock, granting five ores at once. This bonus stacks additively with the bonuses from Varrock armour, the Mining cape's perk, and the reward from the Shooting Star Distraction and Diversion, potentially resulting in a total of 8 ores at once. Additionally, they consume 5 coal stone spirits to produce 5 coal each time they are mined. Unlike coal rocks, these grant igneous geodes rather than sedimentary geodes.

The deposits are guarded by the creatures of the Living Rock Caverns, the living rock protectors, living rock strikers, and living rock patriarch. These monsters are aggressive and pose a threat to any players mining from the concentrated deposits, so it is generally advised to mine on world 83, the official world for the Living Rock Caverns. Multitudes of players mine and fish in the Living Rock Caverns on this world, lessening an individual player's chance of coming under attack. However the extremely high volume of players on this world may make lag an issue for players with lower-performance computers. Alternately, a magic golem outfit or a complete set of any shark outfit will render the creatures docile, allowing players to use any world.

Using an augmented pickaxe of earth and song , having 99 mining with a skillcape equipped, a lava titan familiar summoned, legendary quarrymaster activated, drinking a juju mining potion and wearing a magic golem outfit, one can gain at least 8500 item xp per hour

The low health of these deposits mean high-level miners will receive ore on almost every other swing. Thus, players using a perfect juju mining potion with signs of the porter and a stack of coal stone spirits will refresh their stamina almost every other swing. Thus, despite their relatively low experience multiplier, concentrated coal deposits are some of the best mining nodes for AFK training.

Concentrated coal deposits are also the lowest-durability Mining node that can yield igneous and metamorphic geodes, and thus the best source of metamorphic geodes in the game.

Mining[edit | edit source]

Concentrated coal deposit.png Concentrated coal deposit
Mining levelMining-icon.png 70Critical hit chance
OutputCoal20%30%
CoreYes check.svgMining-icon.png 25-
Stone spiritCoal stone spirit.png CoalRockertunity multiplier
GeodeIgneous geode.png Igneousx5x6
Rock statsMining-icon.png 21-
Durability500Double ore chance
Hardness1405%10%
Multiplier0.8Mining-icon.png 27-
Base ore5Geode chance
Varrock armour double chance10%15%
Varrock armour 1.png4%Mining-icon.png 23-

Trivia[edit | edit source]

  • Prior to the Mining and Smithing rework, concentrated coal deposits would collapse, and could not be mined from until it replenished itself, which would happen after a random delay. Unlike most Mining rocks, no competition existed for resources when mining from concentrated coal deposits.
  • The mining skill guide states the level needed to mine the deposit is 77, however this is wrong.
  • Mining these used to be a daily challenge for the Mining skill.