Infected Jewel

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Infected Jewel
  • Infected Jewel.png
Stack digit 1.png
TypeAccessoryCrafting material
Tooltip+1 HP/s life regen
Grants 16 defense and +2 HP/s life regen while afflicted with any debuff
Massively boosts natural life regen while afflicted with any debuff
Granted defense fades away quickly when not afflicted with any debuffs
Each debuff beyond the first grants 5 additional defense
Makes the Astral Infection debuff harmless
'A beautiful gemstone tarnished by spaceborne rot'
RarityRarity Level: 7
Sell 9 Gold Coin.png 60 Silver Coin.png
Research1 required

The Infected Jewel is a craftable Hardmode accessory which is the direct upgrade of the Crown Jewel. It grants 6 defense and 2 life regen. While any debuffs are active, the player's defense and life regen will increase by an additional 16 and 4 respectively (for a total of 22 defense and 6 life regen), and minimum natural life regen will be raised. If the player has multiple debuffs, each additional one grants 5 defense. As the player loses debuffs, the defense granted by debuffs will gradually decrease at a rate of one defense per second. Additionally, it negates the effects of the Astral Infection debuff, while still counting towards being debuffed.



Used in


  • None of the effects stack with any other accessories in its line other than the defense provided.
  • While debuffs are active, natural life regen is increased by applying a lower bound of the lifeRegenTime variable to 1800 at all times, which effectively provides a headstart of 30 seconds.
    • This would persist even when all debuffs run out until the player gets hit, which would then reset it to 0. Getting hit while debuffed would still reset lifeRegenTime to 1800 due to the lower bound.


These history sections are still a work-in-progress, and may not yet contain changes relevant to the current version of the Calamity Mod.
    • Renamed from "Celestial Jewel" to "Infected Jewel".
    • Reworked:
      • Nerfed base defense boost from 8 to 6, but buffed defense boost while inflicted with a debuff from 11 to 16, and each additional debuff now grants 5 defense.
      • No longer allows the player to randomly teleport by pressing the Astral Teleport key.
      • Now increases life regeneration by 2, with an additional 4 life regeneration while inflicted with a debuff. Defense boost while inflicted with a debuff now slowly fades away when no longer inflicted with a debuff.
      • It also makes the Astral Infection debuff harmless.
    • Now uses 10 Aureus Cells and 25 Stardust in its recipe instead of 3 Teleportation Potions, 15 Aureus Cells, and 15 Sea Prisms.
    • Now grants 8 defense. Reduced the defense boost under a damaging debuff from 15 to 11.
    • Now uses Crown Jewel and 15 Sea Prisms in its recipe instead of Any Large Gem.
    • Nerfed defense boost when under a damaging debuff from 20 to 15. Nerfed life regeneration boost from 3 to 2, and cumulatively 6 to 4 under a damaging debuff.
    • Now uses Any Large Gem, 15 Aureus Cells, and 3 Teleportation Potions in its recipe instead of a Crown Jewel and 20 Aureus Cells.
    • Teleports no longer work while a boss is alive.
  • Nerfed life regeneration boost when under a damaging debuff from 8 to 4.
  • Nerfed life regeneration boost when not under a damaging debuff from 4 to 2.