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OSRS Gemstone Crab Guide Image 1. What is the Gemstone Crab
  • The Gemstone Crab is a new Varlamore boss designed for AFK-friendly combat.
  • It has infinite health and never dies — instead it relocates every 10 minutes.
  • The Crab only deals tiny damage (max hit = 1), so it’s very safe.
  • After burrowing, it leaves behind a shell you can mine for gem rewards.
2. Requirements & Access
  • Unlock the Tlai Rainforest / Tal Teklan area through Varlamore progression.
  • A pickaxe is required to mine the remains.
  • Bring a Gem bag or plenty of inventory slots for loot.
  • Some quests may be needed (e.g. Children of the Sun).
3. Location & Spawn Mechanics
  • The Crab has multiple fixed spawn points in Tal Teklan.
  • It stays at one spot for ~10 minutes, then burrows and moves.
  • Caves connect spawn points, allowing players to follow quickly.
4. Combat & Strategy
  • Focus on maximum DPS gear — defense isn’t needed.
  • All combat styles work (melee, ranged, magic).
  • Minimal attention required — ideal for semi-AFK training.
  • Move quickly when it relocates to reduce downtime.
5. Rewards
  • Combat XP is gained continuously while attacking.
  • Mining the shell grants uncut gems such as:
    Sapphire, Emerald, Ruby, Diamond, Opal, Jade, Red Topaz, Dragonstone.
  • Only the top 16 damage dealers can mine the shell at each spawn.
  • Use a Gem bag or bank often to avoid missing loot.
6. Tips & Best Practices
  • Use best DPS gear (e.g. Whip, Blowpipe, Trident).
  • Time the burrow — be ready to move when it happens.
  • Contribute enough damage to stay in the top 16.
  • Keep inventory clear for gems.
  • Perfect for AFK sessions while working or multitasking.
7. Potential Drawbacks
  • Downtime when it relocates (every 10 minutes).
  • Hardcore Ironmen can technically die if careless.
  • Rare gems aren’t guaranteed — drops can be streaky.
  • Combat XP rates are lower than high-risk bosses.
The Gemstone Crab is a chill, low-risk boss great for AFK combat training and gem farming!