- For strategies on mining Hellstone, see 指南:Mining Techniques#Mining Hellstone.
獄石 是一種能在地獄被發現的一種礦石 ， Mining Hellstone requires at least a 夢魘/死亡使者鎬 (≥65% Mining Power) or better. Hellstone in the Underworld emits a faint glow and releases a half-tile of 熔岩 when mined, a full tile on 專家模式. Hellstone tools are among the most powerful that can be acquired in Pre-困難模式, rivaled only by the fish themed 工具 that can be caught from 釣魚, the 掠奪鯊, 鋸齒鯊, and 岩魚錘.
Hellstone inflicts the 燃燒 減益 on players who touch it. Items that protect the player from fire blocks (including the 黑曜石骷髏頭, 黑曜石護盾, 黑曜石馬掌, 十字章護盾, 黑曜石水上漂靴, 熔岩靴, and 黑曜石皮藥水s) will allow players to touch it without incurring fire damage.
- Lava can be farmed by repeatedly mining and placing Hellstone in the 地獄.
- The 洞穴探險 buff will not light up Hellstone, and the 金屬探測器 (and upgrades) will also not show Hellstone nearby. However, the 危險感 buff will. Nevertheless, it can be found easily due to the sparks it produces and its contrast to the ash blocks.
- 在 困難模式, 獄石能被 雷管 和 Bombs 所破壞。
- 1.3.1：Inventory sprite updated.
- 126.96.36.199：Placed sprite updated.
- Stack limit increased from 250 to 999.
- No longer causes invincibility frames when touched, instead giving the 燃燒 Debuff.
- 1.1：Hellstone can now be destroyed by dynamite or bombs while in 困難模式. Rarity changed from White to Green.
- 1.0.5：Now has a sparkle effect.