Hellstone Crate

The Hellstone Crate is a Hardmode crate that can only be fished in lava. Opening Hellstone and Obsidian Crates is the only way to obtain the Obsidian Lock Box, and therefore any Underworld-exclusive items normally found in locked Shadow Chests, once the Underworld has been fully looted. Its pre-Hardmode counterpart is the Obsidian Crate.

Drops
Note: Only one type of ore and one type of bar can drop, not both a pre-Hardmode type of ore and a Hardmode type of ore, or both a pre-Hardmode type of bar and a Hardmode type of bar. The table above implies otherwise with the respective groups being in separate rows, but that is for readability purposes. The chance that a type of ore is dropped is, and the chance that a type of bar is dropped is.