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Jewelled Crab

Npc

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Jewelled Crab
DimRedGreenBlue
Jewelled Crab
Released5 January 2017 (Update)
MembersYes
RaceCrab
LocationChambers of Xeric
League regionKourend Kourend✓
OptionsAttack, Smash
ExamineThe gems on its rocky carapace are glowing dimly.
Advanced data
NPC ID7576
LinkMOID

Jewelled Crabs are found in the crab puzzle room within the Chambers of Xeric. These crabs cannot be killed by conventional combat. However, the crystals which are on the crabs can be attacked in order to change their colour. Attacking with melee (or smashing it with a hammer) will cause a crab to change Red, magic for Blue, and ranged for Green.

Jewelled Crabs regenerate its stats at a rate of 1 per tick, faster than the standard rate of 1 per 100 ticks.[1]

For solo players, they can use a standard hammer, or any blunt weapon with crush bonuses, including but not limited to: the (dragon) warhammer(s), the elder maul, the abyssal bludgeon, the cursed goblin hammer, Torag's hammers, granite maul, granite hammer, frying pan, meat tenderiser, etc. and use the right-click "Smash" option on the crab. This will stun the crab in place for a while.

Each crystal requires the following orbs:

Crystal Orb Colour Style
Black White None
Yellow Blue Mage
Cyan (Blue) Red Melee
Magenta (Purple) Green Range

The duration of the stun is dependent on the size of the party.[2]

Party size Stun duration
Solo 50 to 60 ticks
2 – 3 30 to 40 ticks
4 – 5 20 to 30 ticks
6+ 10 to 20 ticks

Changes

Date Changes
12 December 2023
(Update)

Tumeken's shadow will now 'splash' on crabs if the player's Magic bonus is -64 or lower.

29 November 2023
(Update | poll)
  • Players can no longer 'splash' on crabs if their Magic bonus is higher than -64.
  • Attacks no longer have any delay after hitting a crab. If your attack changes the crab's colour, you will not automatically re-attack.

References

  1. ^ Jagex. Mod Ash on Discord. 9 July 2026. Mod Ash: "Stone guardians - 8 Muttadiles - 15 Vasa Nistirio - 10 Vasa's crystal - 9 Tekton - 15 LizardShamans - 20 Skeletal mystics - 25 Jewelled Crabs - 1 Vespula - 10 Vespula's portal - 45 Vespula's grubs - 10000 (i.e. never) Vespine soldier (flying) - 16 Vespine soldier (walking) - 10000 Otherwise default should be 100, as for outside CoX.",
    in reply to
    "Hi@JagexAsh would you per chance be able to say the regen time (in ticks) for mobs in chambers?"
  2. ^
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Source

Content from the Old School RuneScape Wiki (operated by Weird Gloop), licensed under CC BY-NC-SA 3.0.

Source siteOld School RuneScape Wiki
Canonical sourceJewelled Crab
Content licenseCC BY-NC-SA 3.0
License statusdeclared
PictureJewelled Crab · file details

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