Astral Ore

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Astral Ore
  • Astral Ore.png
  • Astral Ore placed graphic
Stack digit 9.pngStack digit 9.pngStack digit 9.pngStack digit 9.png
  • Pickaxe icon.png 210%
TypeBlockOreCrafting material
PlaceableTango Tick1.png
Use time15 Average
Inflicts DebuffAstral Infection (debuff)Astral Infection
100% chance

Debuff durationInfinite (Contact)
Debuff tooltipYour flesh is melting off
Map color#FF99FF ●
RarityRarity Level: 9
Tile value900
Sell 36 Silver Coin.png
Research100 required
Dropped by
Astral Slime (After Astrum Deus has been defeated)8-12 / 11-16 Expert Mode100%
Astral Crate10-2020% (post-Astrum Deus map.png)
Novae Slag (After Astrum Deus has been defeated)111.47%
Celestial Remains (After Astrum Deus has been defeated)110.74%

"The seal of the stars has been broken!"

Astral Ore is a Hardmode ore that generates in the world after the Wall of Flesh or Astrum Aureus have been defeated, converting many blocks around it into the Astral Infection, along with converting Pre-Hardmode ores into more Astral Ore. A Picksaw or a pickaxe with higher power can mine it but only if Astrum Deus has been defeated. Additionally, after Astrum Deus' defeat, Astral Slimes will begin to drop Astral Ore.

Similarly to how Hellstone inflicts Burning, Astral Ore inflicts the Astral Infection debuff on contact. Up to 60-70 bars can be crafted from one astral meteorite.


Used in


  • Astral Ore can also be obtained from various sources in various stacks after Astrum Deus has been defeated.
  • Astral Ore is immune to explosives even after Astrum Deus has been defeated.
  • The Crystyl Crusher's beam can destroy Astral Ore before Astrum Deus has been defeated.
  • Only the initial astral meteorite impact will convert existing ore into Astral Ore, and subsequent meteor drops, Star Struck Water, and Astral Solution will not convert Pre-Hardmode ores into Astral Ore.


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
    • Lighting no longer changes in brightness.
    • Disabled custom tile merging behavior to prevent performance issues.
  • Decreased pickaxe resistance from 5 to 3.
  • Fixed an issue that caused it to not receive proper shaders in Color and White lighting.
  • Now always immune to explosives, defeating Astrum Deus will no longer allow it to be destroyed with explosives.
  • Increased pickaxe power requirement from 200% to 210%.
  • Should now appear above Life Crystals on the Metal Detector.
  • Increased sell price from 2 Silver Coin to 36 Silver Coin.
    • Now uses the Rarity Level: 9 rarity instead of Rarity Level: 7.
    • Increased pickaxe power requirement from 199% to 200%.
  • Can now only be mined or blown up after defeating Astrum Deus.
    • Now uses the Rarity Level: 7 rarity instead of Rarity Level: 4.
    • Decreased the amount of Astral Ore tiles that need to exist in the world in order to stop an astral meteor from falling by half (400 to 200 for small worlds, 600 to 300 for medium, 800 to 400 for large).
    • Now emits light.
  • No longer inflicts nearby players with God Slayer Inferno.
  • Now unable to be mined until after defeating Astrum Deus, instead of having a pickaxe requirement of 500% until after defeating Astrum Deus.