Fossil

Fossils are a special type of currency that can be socketed into resonators to modify the crafting behavior in specific ways, released in the Delve league.

Fossil belongs to Stackable Currency item class in terms of the item filter.

Warning: Despite the similar wording to Chaos OrbsChaos OrbStack Size: 10Reforges a rare item with new random modifiersRight click this item then left click a rare item to apply it.
Shift click to unstack., using a fossil + resonator on an item with a meta-crafting mod ( or ) will ignore that mod and overwrite existing prefixes and suffixes ignoring any restrictions.

Obtaining

Fossil Remains, a kind of loot container for fossil

Some fossils are tied to specific Delve nodes.

• Crystal Spire: Hollow FossilHollow FossilStack Size: 10Has an Abyssal socketPlace in a Resonator to influence item crafting.
  Shift click to unstack.
• Haunted Tomb:
• Humid Fissure: Fractured FossilFractured FossilStack Size: 10Creates a split copy. Cannot be used to split Influenced,
  Enchanted, Fractured, or Synthesised items.Place in a Resonator to influence item crafting.
  Shift click to unstack.
• Molten Cavity: Faceted FossilFaceted FossilStack Size: 10More Gem modifiersPlace in a Resonator to influence item crafting.
  Shift click to unstack.
• Stonewood Hollow:
• Time-Lost Cavern: Glyphic FossilGlyphic FossilStack Size: 10Has a Corrupt Essence modifierPlace in a Resonator to influence item crafting.
  Shift click to unstack.

Other fossil are either spawn along the road between nodes, behind fractured walls, or Smuggler's Stash encounter, etc.

There are additional ways to obtain fossils by random:

• (random fossils)
• Vaal Vessel with end-game vaal side area mod
• unique synthesis map with map mods Synthesised # Monsters have #% chance to drop a Fossil (map mod only be revealed after using the map item in map device)
• Legion with fossil reward type (random fossils).
• Fossilised IncubatorFossilised IncubatorAdds an incubated Fossil item to an equippable item
  Item drops after killing # monstersFossil ItemRight click this item then left click an item to apply it. The Incubated item drops after killing a specific number of monsters. (random fossils)
• Blight with fossil reward type (random fossils).
• Metamorph with fossil reward type (using Metamorph sample with Drops additional Fossils; drops random fossils)
• Delirium with fossil reward type (drops random fossils), from wild Delirium or map crafted with Fossilised Delirium OrbFossilised Delirium OrbStack Size: 10Modifies a Map item adding layers of Delirium with the Fossils reward typeRight click this item then left click a Map item to apply it. Can apply up to 5 to a single Map item.
  Shift click to unstack. or by random.
• Wild Homunculus crafting reward (exchange fossil with another fossil by random)
• Heist Delve reward chest (drops random fossils)
• Ritual spawns random purchasable items, including fossils.
• Trials of Chaos (or known as Ultimatum) spawns random rewards, including fossils.

Delve

List of fossil items organized by the Delve biomes you can obtain them from.

Biome	Fossil	Fossil found in location
Mines	Metallic FossilMetallic FossilStack Size: 20More Lightning modifiers No Physical modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Mines	Serrated FossilSerrated FossilStack Size: 20More Attack modifiers Fewer Caster modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Mines	Pristine FossilPristine FossilStack Size: 20More Life modifiers No Defence modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Mines	Aetheric FossilAetheric FossilStack Size: 20More Caster modifiers Fewer Attack modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Fungal Caverns		Haunted Tomb nodes only
Fungal Caverns	Dense FossilDense FossilStack Size: 20More Defence modifiers No Life ModifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Fungal Caverns		Anywhere
Fungal Caverns	Perfect FossilPerfect FossilStack Size: 20Improved QualityPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Fungal Caverns	Corroded FossilCorroded FossilStack Size: 20More Physical Ailment or Chaos Ailment modifiers No Elemental modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Fungal Caverns	Gilded FossilGilded FossilStack Size: 10Item is overvalued by vendorsPlace in a Resonator to influence item crafting. Shift click to unstack.	Behind Fractured Walls only
Petrified Forest		Stonewood Hollow nodes only
Petrified Forest	Bound FossilBound FossilStack Size: 20More Minion, Aura or Curse modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Petrified Forest	Jagged FossilJagged FossilStack Size: 20More Physical modifiers No Chaos modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Petrified Forest	Corroded FossilCorroded FossilStack Size: 20More Physical Ailment or Chaos Ailment modifiers No Elemental modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Petrified Forest	Sanctified FossilSanctified FossilStack Size: 10Numeric modifier values are lucky High Level modifiers are more commonPlace in a Resonator to influence item crafting. Shift click to unstack.	Behind Fractured Walls only
Abyssal Depths	Hollow FossilHollow FossilStack Size: 10Has an Abyssal socketPlace in a Resonator to influence item crafting. Shift click to unstack.	Crystal Spire nodes only
Abyssal Depths		Anywhere
Abyssal Depths	Bound FossilBound FossilStack Size: 20More Minion, Aura or Curse modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Abyssal Depths	Gilded FossilGilded FossilStack Size: 10Item is overvalued by vendorsPlace in a Resonator to influence item crafting. Shift click to unstack.	Behind Fractured Walls only
Abyssal Depths	Lucent FossilLucent FossilStack Size: 20More Mana modifiers No Speed modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Behind Fractured Walls only
Frozen Hollow	Glyphic FossilGlyphic FossilStack Size: 10Has a Corrupt Essence modifierPlace in a Resonator to influence item crafting. Shift click to unstack.	Time-Lost Cavern nodes only
Frozen Hollow		Anywhere
Frozen Hollow	Serrated FossilSerrated FossilStack Size: 20More Attack modifiers Fewer Caster modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Frozen Hollow	Prismatic FossilPrismatic FossilStack Size: 20More Elemental modifiers No Physical Ailment or Chaos Ailment modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Frozen Hollow	Sanctified FossilSanctified FossilStack Size: 10Numeric modifier values are lucky High Level modifiers are more commonPlace in a Resonator to influence item crafting. Shift click to unstack.	Behind Fractured Walls only
Magma Fissure	Faceted FossilFaceted FossilStack Size: 10More Gem modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Molten Cavity nodes only
Magma Fissure		Anywhere
Magma Fissure	Prismatic FossilPrismatic FossilStack Size: 20More Elemental modifiers No Physical Ailment or Chaos Ailment modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Magma Fissure	Pristine FossilPristine FossilStack Size: 20More Life modifiers No Defence modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Magma Fissure	Enchanted FossilEnchanted FossilStack Size: 20Has a Labyrinth EnchantmentPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Magma Fissure	Encrusted FossilEncrusted FossilStack Size: 10More sockets Can have white socketsPlace in a Resonator to influence item crafting. Shift click to unstack.	Behind Fractured Walls only
Sulfur Vents	Fractured FossilFractured FossilStack Size: 10Creates a split copy. Cannot be used to split Influenced, Enchanted, Fractured, or Synthesised items.Place in a Resonator to influence item crafting. Shift click to unstack.	Humid Fissure nodes only
Sulfur Vents	Metallic FossilMetallic FossilStack Size: 20More Lightning modifiers No Physical modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Sulfur Vents	Perfect FossilPerfect FossilStack Size: 20Improved QualityPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Sulfur Vents	Aetheric FossilAetheric FossilStack Size: 20More Caster modifiers Fewer Attack modifiersPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere
Sulfur Vents	Encrusted FossilEncrusted FossilStack Size: 10More sockets Can have white socketsPlace in a Resonator to influence item crafting. Shift click to unstack.	Anywhere

Note that the node Smuggler's Stash does not tie to any biome

List of fossils

Main page: List of fossils

Delve modifiers

Main page: List of delve modifiers#Fossils

Some fossils can also add special Delve fossil-only modifiers, however, these modifiers are different from Delve drop-only modifiers from specific Delve nodes. Delve drop-only modifiers are drop-only while fossil-only modifiers are from fossil only. They both cannot be crafted from other sources. Lastly, the game developer, GGG, removed a large chunk of Delve fossil-only modifiers from the spawnable pool. Those legacy modifiers can only found from existing item which can be obtained from trading with other players in permanent leagues. GGG also added new influence modifiers that similar to the removed fossil-only modifiers, but not all removed Delve modifiers have similar influence modifiers.

Related divination cards

The following divination cards can be exchanged for fossils:

Item	Stack Size	Effect(s)

Version history

Version	Changes
3.12.0	Item modifier tags have been entirely reworked with a goal in mind of consistency and simplicity. These changes have negligible impacts to the odds of various modifiers appearing on rare items naturally, but may have impacts to the results of certain crafting methods. As a result of the above changes, several fossil descriptions have changed slightly.
3.10.0	Fossils can no longer craft any prefix or suffix mods that cannot be obtained elsewhere, with the exception of those granted by Faceted, Bloodstained and Hollow Fossils. Implicit modifiers (such as the one which changes an item's vendor sell price) remain. The following mods have been relocated, while all others can no longer be obtained: On Boots: +2 to level of socketed Fire Gems (now from Warlord's Influence), +2 to level of socketed Cold Gems (now from Redeemer's Influence), +2 to level of socketed Lightning Gems (now from Crusader's Influence), +2 to level of socketed Chaos Gems (now from Hunter's Influence), +1 to global level of raised Spectres (now from Elder's Influence). Helmet: Nearby Enemies have -x% Fire Resistance (now from Warlord's Influence), Nearby Enemies have -x% Cold Resistance (now from Redeemer's Influence), Nearby Enemies have -x% Lightning Resistance (now from Crusader's Influence), Nearby Enemies have -x% Chaos Resistance (now from Hunter's Influence), Nearby Enemies take x% increased Physical Damage (now from Elder's Influence), increased effect of Fortify (now from Crusader's Influence). Body Armour: Socketed Attacks have -15 to Mana Cost (now from Warlord's Influence), x% increased Aura Effect on you (now from Redeemer's Influence). Quiver: x% chance to gain a Frenzy Charge on hitting a Rare or Unique Enemy (now from Elder's Influence). Belt: Increased Chaos Damage (now from Hunter's Influence), increased Physical Damage (now from Elder's Influence), increased Elemental Damage (now from Shaper's Influence), increased Energy Shield from Body Armour (now from Shaper's Influence, and now a Prefix), chance for double Armour Effect when hit (now from Elder's Influence, and now a Prefix). Rings: Fire/Cold/Lightning/Physical/Chaos leech modifiers can now exclusively be found from special elemental Delve encounters. Weapons: Socketed Attacks/Spells deal x% more Damage (now found from Shaper's Influence), chance for Poison/Bleeding inflicted with this weapon to deal more damage (now found from Elder's Influence), chance to Intimidate on Hit (now found from Hunter's Influence), Auras from your Skills grant increased Damage to you and Allies (now from Redeemer's Influence). Jewels: Damage penetrates 1% Fire/Cold/Lightning/Elemental Resistance (now from Corrupted implicits). Glove, Amulet and Shield Fossil-exclusive modifiers can no longer be obtained in any form. Existing items will be unchanged.
3.4.0	Introduced to the game.