Gemstone Crab
Differs from OSRSA world boss that cannot die: fight it for 10 minutes, then the top 16 damage dealers mine its shell for uncut gems. No skill floor at all.
The crab cannot die and hits very weakly, so it is safe for any account. Damage counts only to rank you for the shell.
How it works
- The crab sits on one of its three sites for 10 minutes. Its health bar shows the time left, not damage.
- When time runs out it burrows. Anyone standing under it is pushed out.
- A shell stays on the spot for 90 seconds. Only the top 16 damage dealers can mine it.
- You mine up to 3 gems, one every 3 ticks. If you stop, you can carry on while the shell is there.
- The crab comes back on another site.
Rewards
Each gem you mine rolls here, and each is rolled on its own:
| Item | Quantity | Chance |
|---|---|---|
 Uncut dragonstone Unique | 1 | 1/5000.2% |
 Uncut opal | 1 | 1/3.5628.1% |
 Uncut jade | 1 | 1/3.5628.1% |
 Uncut red topaz | 1 | 1/5.3418.7% |
 Uncut sapphire | 1 | 1/10.79.36% |
 Uncut emerald | 1 | 1/166.24% |
 Uncut ruby | 1 | 1/166.24% |
 Uncut diamond | 1 | 1/32.13.12% |
Chance per gem mined: 1/500 dragonstone, otherwise weighted by 32. Up to 3 gems per shell.