Using the Jeweler's Table combine:
- A fresh sword (Iron, Gold, Diamond, or Netherite).
- One of the four gems (Diamond, Emerald, Ruby, Sapphire).
Effects depend on the gem used:
- Ruby: Damage boost and Strength.
- Emerald: Regeneration and Absorption (with cooldown).
- Diamond: Double durability and Resistance.
- Sapphire: Speed and Jump Boost.