Delve currency is divided into Fossils and Resonators. Fossils are socketed into a Resonator, which can then be used on items to allow for more deterministic outcomes. Some fossils grant access to modifiers that are otherwise unobtainable through other methods.
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 Icon 
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 Name 
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Stack Size: 1 / 20 
More Chaos modifiers 
No Lightning modifiers  | 
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Stack Size: 1 / 20 
More Caster modifiers 
Fewer Attack modifiers  | 
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Stack Size: 1 / 10 
Does not apply to: Contracts, Blueprints, Heist Equipment 
Corrupted 
Has a Corrupted implicit modifier  | 
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Stack Size: 1 / 20 
More Minion, Aura or Curse modifiers 
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Stack Size: 1 / 20 
More Physical Ailment or Chaos Ailment modifiers 
No Elemental modifiers  | 
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Stack Size: 1 / 20 
More Defence modifiers 
No Life Modifiers  | 
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Stack Size: 1 / 10 
More Gem modifiers 
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Stack Size: 1 / 10 
Creates a split copy 
Cannot be used to split Influenced, Enchanted, Fractured, or Synthesised items  | 
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Stack Size: 1 / 20 
More Cold modifiers 
No Fire modifiers  | 
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Stack Size: 1 / 10 
Item is overvalued by vendors 
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Stack Size: 1 / 10 
Applies to: Weapons, Body Armour, Shields, Helmets, Gloves, Boots, Amulets, Belts, Rings, Quivers 
Has a Corrupt Essence modifier 
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Stack Size: 1 / 10 
Applies to: Weapons, Body Armour, Helmets, Gloves, Boots 
Has an Abyssal socket 
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Stack Size: 1 / 20 
More Physical modifiers 
No Chaos modifiers  | 
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Stack Size: 1 / 20 
More Mana modifiers 
No Speed modifiers  | 
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Stack Size: 1 / 20 
More Lightning modifiers 
No Physical modifiers  | 
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Stack Size: 1 / 20 
Applies to: Weapons, Body Armour, Shields, Helmets, Gloves, Boots, Maps 
Improved Quality 
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Potent Alchemical Resonator
 Stack Size: 1 / 10 
Upgrades a normal item to a rare item 
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Potent Chaotic Resonator
 Stack Size: 1 / 10 
Reforges a rare item with new random modifiers 
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Powerful Alchemical Resonator
 Stack Size: 1 / 10 
Upgrades a normal item to a rare item 
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Powerful Chaotic Resonator
 Stack Size: 1 / 10 
Reforges a rare item with new random modifiers 
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Prime Alchemical Resonator
 Stack Size: 1 / 10 
Upgrades a normal item to a rare item 
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Prime Chaotic Resonator
 Stack Size: 1 / 10 
Reforges a rare item with new random modifiers 
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Primitive Alchemical Resonator
 Stack Size: 1 / 10 
Upgrades a normal item to a rare item 
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Primitive Chaotic Resonator
 Stack Size: 1 / 10 
Reforges a rare item with new random modifiers 
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Stack Size: 1 / 20 
More Elemental modifiers 
No Physical Ailment or Chaos Ailment modifiers  | 
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Stack Size: 1 / 20 
More Life modifiers 
No Defence modifiers  | 
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Stack Size: 1 / 10 
Numeric modifier values are lucky 
High Level modifiers are more common  | 
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Stack Size: 1 / 20 
More Fire modifiers 
No Cold modifiers  | 
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Stack Size: 1 / 20 
More Attack modifiers 
Fewer Caster modifiers  | 
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Stack Size: 1 / 20 
More Speed modifiers 
No Mana modifiers  | 
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Stack Size: 1 / 10 
Makes a random modifier type much more likely and prevents 
another random modifier type Effects revealed once resonator is fully socketed  | 
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Timeworn Reliquary Key
 Portal: Timeworn Reliquary 
Area Level: 75 
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Deft Fossil
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Fundamental Fossil
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