Caves and village progress
Obsidian
Obsidian is a deep cave material for crafting and requires both access to the relevant chamber route and the right hammer.
Deep Cave chambers beyond the Very Dark Room.
The cave trip can be repeated for additional obsidian from accessible deposits. Opening the route beyond the Very Dark Room is a progression step, not a repeatable farm.
Stop collecting when you have the amount needed for your current craft or request; return later if another specific use requires more.
Open a guide to find other locations and see what the item is used for.
Obsidian is a deep cave material for crafting and requires both access to the relevant chamber route and the right hammer.