Resonator

Resonators are a class of items similar to currency items that allow for the crafting of rare items when fully socketed with fossils. Fossils can be removed from a partially-socketed resonator, but once a resonator has been fully socketed, the fossils cannot be reclaimed. Fossil modifiers that prevent certain types of modifiers from appearing supersede modifiers that grant more of a modifier type. Resonators will display a full list of modifiers granted from socketed fossils when hovered over. Resonators cannot be socketed with multiple of the same fossil. Resonators also inherit item use restrictions from socketed fossils.

A resonator socketed with a Jagged FossilJagged FossilStack Size: 20More Physical modifiers
No Chaos modifiersPlace in a Resonator to influence item crafting.
Shift click to unstack., Scorched FossilScorched FossilStack Size: 20More Fire modifiers
No Cold modifiersPlace in a Resonator to influence item crafting.
Shift click to unstack., and Frigid FossilFrigid FossilStack Size: 20More Cold modifiers
No Fire modifiersPlace in a Resonator to influence item crafting.
Shift click to unstack..

Chaotic and Alchemical Resonators function similarly to Chaos OrbChaos OrbStack Size: 20Reforges a rare item with new random modifiersRight click this item then left click a rare item to apply it.
Shift click to unstack. and Orb of AlchemyOrb of AlchemyStack Size: 20Upgrades a normal item to a rare itemRight click this item then left click a normal item to apply it.
Shift click to unstack. respectively. Despite the similar wording to Chaos OrbsChaos OrbStack Size: 20Reforges 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 resonator on an item with a metamod (such as prefixes cannot be changed or cannot roll caster modifiers) will completely ignore the effects of the modifier.

Resonators can stack while in an unsocketed state. Players can unstack a single resonator by holding the Shift key and clicking while holding a stack of resonators. Additionally, holding the Shift key while holding a stack of fossils to socket into the resonator will prevent accidentally picking up the resonator instead, which can occur while trying to fill resonators quickly.

Resonators are considered Delve Stackable Socketable Currency. There is an older variant of this item class available, called Delve Socketable Currency. They are converted to the new item class upon pickup. The old variant is no longer obtainable.

List of resonators

Main page: List of resonators

Only Chaotic Resonators drop in the core game; existing legacy Alchemical Resonators can be used in permanent leagues.

Item	Drop Level	Effect(s)	Help Text
Potent Chaotic ResonatorPotent Chaotic ResonatorStack 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.	34	Reforges a rare item with new random modifiers	Right click this item then left click a rare item to apply it. Shift click to unstack.
Powerful Chaotic ResonatorPowerful Chaotic ResonatorStack 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.	34	Reforges a rare item with new random modifiers	Right click this item then left click a rare item to apply it. Shift click to unstack.
Prime Chaotic ResonatorPrime Chaotic ResonatorStack 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.	68	Reforges a rare item with new random modifiers	Right click this item then left click a rare item to apply it. Shift click to unstack.
Primitive Chaotic ResonatorPrimitive Chaotic ResonatorStack 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.	34	Reforges a rare item with new random modifiers	Right click this item then left click a rare item to apply it. Shift click to unstack.

In Ruthless mode, Chaotic Resonators are replaced with Alchemical Resonators.

Item	Drop Level	Effect(s)	Help Text
Potent Alchemical ResonatorPotent Alchemical ResonatorStack Size: 10Upgrades a normal item to a rare itemRight click this item then left click a normal item to apply it. Shift click to unstack.	1	Upgrades a normal item to a rare item	Right click this item then left click a normal item to apply it. Shift click to unstack.
Powerful Alchemical ResonatorPowerful Alchemical ResonatorStack Size: 10Upgrades a normal item to a rare itemRight click this item then left click a normal item to apply it. Shift click to unstack.	34	Upgrades a normal item to a rare item	Right click this item then left click a normal item to apply it. Shift click to unstack.
Prime Alchemical ResonatorPrime Alchemical ResonatorStack Size: 10Upgrades a normal item to a rare itemRight click this item then left click a normal item to apply it. Shift click to unstack.	68	Upgrades a normal item to a rare item	Right click this item then left click a normal item to apply it. Shift click to unstack.
Primitive Alchemical ResonatorPrimitive Alchemical ResonatorStack Size: 10Upgrades a normal item to a rare itemRight click this item then left click a normal item to apply it. Shift click to unstack.	1	Upgrades a normal item to a rare item	Right click this item then left click a normal item to apply it. Shift click to unstack.

Version history

Version	Changes
3.20.0	Alchemical Resonators can now be found only in Ruthless mode. They replace all instances of Chaotic Resonators. [Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.]
3.16.0	Fossils and Resonators are now more commonly found within Delve, and less commonly found from other sources. Alchemical Resonators are no longer purchasable from Niko, and can no longer be obtained from chests or any other sources. Existing Alchemical Resonators will still function as usual.
3.8.0	Resonators can now stack. They have a stack size of 10 in normal Stash Tabs and the inventory, and the Primitive Resonators can stack to 5000 in the Currency Tab
3.4.0	Introduced to the game