Core Keeper Wiki
Advertisement
Iron Ore Boulder in Forgotten Ruins

An Iron Ore Boulder found in the Forgotten Ruins.

An ore boulder is a large shard of ore that contains 1,800 raw ore.

In order to harvest these boulders, a Crude Drill or Drill must be placed on any of the boulder's sides, which will then need to be connected to an electricity source. Multiple drills can be placed against the boulder's sides, increasing the rate the ore is harvested. A maximum of 8 drills can be placed against a boulder; two on each of the four sides.

It is possible, with a weapon with high enough damage, to harvest these boulders with repeated attacks, such as the Rune Song's secondary attack.[1] However, this is slower than mining the surrounding biome walls for ore, and appears to be unintended.

The rate at which ore can be extracted from a boulder is 0.5–2.0 per minute over the course of 15–60 hours, depending on the amount and type of drills on it.

Once the drill is powered, the boulder will start shaking and making a *clink* noise with each hit. After the boulder is depleted, it will break and disappear.

Ore boulders are visible on the map as 2×2 squares of a single-color.

There are 9 types of ore boulders in the game, one for every metal ore.

Types[]

Image Ore extracted Location Map color
Copper Ore Boulder
Copper Ore Copper Ore
Tin Ore Boulder
Tin Ore Tin Ore
Iron Ore Boulder
Iron Ore Iron Ore
Gold Ore Boulder
Gold Ore Gold Ore
Scarlet Ore Boulder
Scarlet Ore Scarlet Ore
Octarine Ore Boulder
Octarine Ore Octarine Ore
Galaxite Ore Deposit
Galaxite Ore Galaxite Ore
Solarite Ore Boulder
Solarite Ore Solarite Ore
Pandorium Ore Boulder
Pandorium Ore Pandorium Ore

Spawning[]

Copper

Natural spawn

Initial generation
Spawnable tilesBiomeChance
Any ground tileUndergrounds Undergrounds0.3%
Any ground tileClay Caves Clay Caves0.1%
Any ground tileForgotten Ruins Forgotten Ruins0.1%
Grass Block Grass Block ground
Stone Block Stone Block ground
Azeos' Wilderness Azeos' Wilderness0.05%
Desert Block Desert Block wallDesert of Beginnings Desert of Beginnings0.01%

Tin

Natural spawn

Initial generation
Spawnable tilesBiomeChance
Any ground tileClay Caves Clay Caves0.3%
Grass Block Grass Block ground
Stone Block Stone Block ground
Azeos' Wilderness Azeos' Wilderness0.05%
Desert Block Desert Block wallDesert of Beginnings Desert of Beginnings0.01%

Structure contents

StructureAmount
Abandoned Clay Mineshaft2
Clay Hut1
Railway Section (style 1)1

Iron

Natural spawn

Initial generation
Spawnable tilesBiomeChance
Any ground tileForgotten Ruins Forgotten Ruins0.3%
Grass Block Grass Block ground
Stone Block Stone Block ground
Azeos' Wilderness Azeos' Wilderness0.05%
Desert Block Desert Block wallDesert of Beginnings Desert of Beginnings0.01%

Gold

Natural spawn

Initial generation
Spawnable tilesBiomeChance
Any ground tileClay Caves Clay Caves0.1%
Any ground tileForgotten Ruins Forgotten Ruins0.1%
Grass Block Grass Block ground
Stone Block Stone Block ground
Azeos' Wilderness Azeos' Wilderness0.01%
Desert Block Desert Block wallDesert of Beginnings Desert of Beginnings0.01%

Structure contents

StructureAmount
Gold Boulder Island1
Railway Section (style 10)1

Scarlet

Natural spawn

Initial generation
Spawnable tilesBiomeChance
Grass Block Grass Block ground
Stone Block Stone Block ground
Azeos' Wilderness Azeos' Wilderness0.2%

Structure contents

StructureAmount
Scarlet Ore Boulders3
Scarlet Camp1

Octarine

Natural spawn

Initial generation
Spawnable tilesBiomeChance
Beach Block Beach Block groundSunken Sea Sunken Sea0.2%

Structure contents

StructureAmount
Octarine Island3
Sea Camp Island (style 1)1

Galaxite

Natural spawn

Initial generation
Spawnable tilesBiomeChance
Desert Block Desert Block wallDesert of Beginnings Desert of Beginnings0.04%

Structure contents

StructureAmount
Galaxite Ore Boulders3
Quarry Boulder Mine (style 1)2
Quarry Boulder Mine (style 2)1

Solarite

Natural spawn

Initial generation
Spawnable tilesChance
Crystal Block Crystal Block ground0.1%

Structure contents

StructureAmount
Dungeons
Crystal forestVaries
Scenes
Solarite Ore Boulders3
Crystal Maze1
Crystal Meadow1

Pandorium

Natural spawn

Initial generation
Spawnable tilesBiomeChance
Fossil Block Fossil Block groundPassage Passage0.03%

Drilling setups[]

Setups info[]

Setups table[]

  • Image Requirements Notes Automatic smelting
    Drill Setup Min 1
    Drill Drill (1)
    Electricity Generator Electricity Generator (1)
    The absolute minimum setup, with ore dropping on the ground behind the Drill. ❌ No
    Drill Setup Min 2
    Drill Drill (1)
    Electricity Generator Electricity Generator (1)
    Robot Arm Robot Arm (1)
    Furnace Furnace or Smelter Kiln Smelter Kiln (1)
    Minimum setup with auto-smelt. ✔ Yes
    Drill Setup Max 1
    Drill Drill (8)
    Electricity Generator Electricity Generator (1)
    Conveyor Belt Conveyor Belt (16)
    Robot Arm Robot Arm (1)
    Electrical Wire Electrical Wire (3)
    Furnace Furnace or Smelter Kiln Smelter Kiln (1)
    Area of the room inside: 8×6 blocks. ✔ Yes
    Drill Setup Max 2
    Drill Drill (8)
    Electricity Generator Electricity Generator (1)
    Conveyor Belt Conveyor Belt (12)
    Robot Arm Robot Arm (2)
    Electrical Wire Electrical Wire (5)
    Furnace Furnace or Smelter Kiln Smelter Kiln (2)
    Area of the room inside: 10×6 blocks. Octarine Ore is the only resource for which two 1×1 smelters are necessary to keep up with ore production. ✔ Yes
    Drill Setup Fury Forges
    Drill Drill (8)
    Electricity Generator Electricity Generator (1)
    Conveyor Belt Conveyor Belt (12)
    Robot Arm Robot Arm (2)
    Electrical Wire Electrical Wire (3)
    Fury Forge Fury Forge (2)
    Area of the room inside: 9×6 blocks. ✔ Yes
  • History[]

    • 1.0.1.4: Ore boulders no longer use the wrong ground sprites in the Undergrounds.
    • 1.0.0.1:
      • Added Pandorium Ore Boulders.
      • Sprites of most ore boulders updated.
      • Galaxite Ore Boulder map color changed from   #f7f0dc to   #d7dcfb.
      • Solarite Ore Boulder map color changed from   #f7f0dc to   #e2a12c.
    • 0.7.0.0-2cab: Added Solarite Ore Boulders.
    • 0.5.2.0-b84a: Ores from boulders now spawn in a random position inside the boulder, so having multiple Drills on the same boulder will not always yield ore from the same Drill.
    • 0.5.0.0-9b96: Added Galaxite Ore Boulders.
    • 0.4.0-3f9c:
      • Added Octarine Ore Boulders.
      • Ore boulders no longer give less total amount of ores before depleting when drilling with more than one drill.
      • Doubled the amount of ore inside ore boulders.
    • 0.3.0-297a: Added Scarlet Ore Boulders.
    • 0.1.91e2cab: Introduced.
    1. [1] @PiggeryAxe. "I, uh, I did an 'impossible' thing." Reddit, 11 Nov. 2023, I, uh, I did an "impossible" thing : r/CoreKeeperGame.
    Advertisement