Ancient Fossil

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Ancient Fossil
  • Ancient Fossil.png
Stack digit 1.png
TypeAccessoryCrafting material
TooltipIncreases mining speed by 10%
RarityRarity Level: 1
Sell 20 Silver Coin.png
Research1 required

The Ancient Fossil is a craftable Pre-Hardmode accessory crafted with 100 Silt Blocks or Slush Blocks. When equipped, it increases mining speed by 10%.



Crafting Station
Any Silt BlockAny Silt Block100
Ancient FossilAncient Fossil1

Used in


  • The item's sprite is based on an Ammonite fossil.


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.

{{history}|Nerfed mining speed boost from 15% to 10%.}}

  • Now increases mining speed at all times instead of only while underground.
  • Nerfed mining speed boost from 35% to 15%.
  • Now only applies its mining speed boost when in the Underground or Cavern layers.
  • Can now also be crafted with Slush Blocks.
  • 1.0: Introduced.