MATERIALS

List of Materials

All 95 materials in Core Keeper, grouped by type and sorted by material tier (Wood → Copper → Tin → Iron → …). Click a name to see how to craft it, where to get it and what it is used for.

Rarity Craftable only

95 items

Bars10 items

	Recipe (materials)	How to get
Copper Bar	Copper Ore×1	Crafting Chest	2
Tin Bar	Tin Ore×1	Crafting Chest	2
Iron Bar	Iron Ore×1	Crafting Chest	7
Gold Bar	Gold Ore×1	Crafting Boss Chest Digging	15
Scarlet Bar	Scarlet Ore×1	Crafting Chest	13
Octarine Bar	Octarine Ore×1	Crafting Chest	14
Galaxite Bar	Galaxite Ore×1	Crafting Chest	15
Solarite Bar	Solarite Ore×1	Crafting Chest	13
Pandorium Bar	Pandorium Ore×1	Crafting Chest	15
Relucite Bar	Relucite Ore×1	Crafting Chest	14

Ores10 items

	Recipe (materials)	How to get
Copper Ore	—	Fishing Boss Enemy Breakable	1
Tin Ore	—	Fishing Boss Enemy Breakable	1
Iron Ore	—	Fishing Boss Enemy Breakable	6
Gold Ore	—	Fishing Boss Enemy Chest Breakable	11
Scarlet Ore	—	Fishing Boss Enemy Chest Breakable	12
Octarine Ore	—	Fishing Boss Enemy Chest Digging Breakable	11
Galaxite Ore	—	Fishing Boss Enemy Digging Breakable	12
Solarite Ore	—	Fishing Boss Enemy Chest Breakable	11
Pandorium Ore	—	Fishing Chest Breakable	10
Relucite Ore	—	Boss Enemy Digging Breakable	11

Gems & gemstones4 items

	Recipe (materials)	How to get
Ancient Gemstone	—	Fishing Boss Enemy Chest Breakable	11
Jungle Emerald	—	Boss Enemy Chest Breakable	15
Ocean Sapphire	—	Boss Enemy Chest Breakable	17
Desert Ruby	—	Boss Enemy Chest Breakable	15

Wood, fiber & parts17 items

	Recipe (materials)	How to get
Gleam Wood Plank	Gleam Wood×1	Crafting Chest	1
Wood	—	Fishing Enemy Chest Breakable	—
Coral Wood	—	Enemy Chest Digging Breakable	—
Gleam Wood	—	Breakable	—
Glass Piece	—	—	1
Plank	Wood×1	Crafting	1
Coral Wood Plank	Coral Wood×1	Crafting	1
Fiber	—	Fishing Boss Enemy Chest Breakable	1
Wool	—	Chest	1
Strolly Poly Plate	—	—	1
Scrap Parts	—	Fishing Enemy Chest Breakable	1
Blasting Dung	—	Boss Enemy Chest Breakable	1
Alien Fuse	—	—	—
Cytoplasm	—	Boss Enemy Chest Breakable	6
Calcified Shell	—	Boss Breakable	6
Corrupted Alloy	—	Boss Enemy Chest Digging Breakable	1
Mechanical Part	—	Boss Enemy Chest Digging Breakable	11

Slime4 items

	Recipe (materials)	How to get
Slime	Ground Slime×10	Crafting Boss Enemy Breakable	1
Poison Slime	Ground Poison Slime×10	Crafting Boss Enemy	1
Slippery Slime	Ground Slippery Slime×10	Crafting Boss Enemy	1
Magma Slime	Ground Magma Slime×10	Crafting Boss Enemy	1

Boss & unique materials8 items

	Recipe (materials)	How to get
Ancient Feather	—	Enemy Breakable	30
Sea Shell	—	Enemy Breakable	11
Scarab Wingcover	—	Enemy	12
Brood Void Neuron	—	—	16
Herald Void Neuron	—	—	16
Ghorm's Horn	—	—	—
Glurch Eye	—	—	—
Stolen Crystal Heart	—	—	—

Pet eggs17 items

	Recipe (materials)	How to get
Loyal Egg	—	Digging	6
Curious Egg	—	—	75
Lively Egg	—	Breakable	6
Oozy Egg	—	Boss	6
Nimble Egg	—	Breakable	6
Oozy Slippery Egg	—	Boss	6
Oozy Poison Egg	—	Boss	6
Oozy Lava Egg	—	Boss	6
Oozy Royal Egg	—	—	6
Fuzzy Egg	—	Enemy Breakable	7
Squishy Egg	—	Boss Chest	7
Arcane Egg	—	Enemy Chest	75
Pest Egg	—	Breakable	120
Nocturnal Egg	—	Chest Breakable	75
Hoppy Egg	—	Fishing Enemy Chest Breakable	6
Lazy Egg	—	Chest Breakable	6
Glimmering Egg	—	Boss	6

Oracle cards9 items

	Recipe (materials)	How to get
Oracle Card "Aura"	—	Digging	150
Oracle Card "Brilliance"	—	Breakable	150
Oracle Card "Inspiration"	—	Enemy Chest	150
Oracle Card "Entity"	—	Boss	150
Oracle Card "Wisdom"	—	—	150
Oracle Card "Metropolis"	—	—	250
Oracle Card "Radiance"	—	Digging	150
Oracle Card "Temperance"	—	Fishing	150
Oracle Card "Endurance"	—	Breakable	150

Music sheets7 items

	Recipe (materials)	How to get
Owlboy - Main Title	Fiber×5	Crafting	6
Core Keeper - Base Theme	Fiber×5	Crafting	6
CSD!3!? – It's Dangerous To Go Alone	Fiber×5	Crafting	6
Happy Birthday To You	Fiber×5	Crafting	6
Terraria - Journey's Beginning	—	—	6
Stardew Valley - Spring (It's a Big World Outside)	—	Breakable	6
Valheim - Meadows	—	Breakable	6

Coins & event materials9 items

	Recipe (materials)	How to get
Ancient Coin	—	Enemy Chest Breakable	—
Pumpkin Coin	—	Event	—
Lucky Coin	—	Event	—
Cookies & Milk	—	—	1
Brown Easter Egg	—	—	1
Rose Easter Egg	—	—	1
Gray Easter Egg	—	—	1
Green Easter Egg	—	—	1
Love Letter	—	—	6

Item names and descriptions are the game's official English text. Data can change with game updates.