Tuff is also a game feature of Minecraft.
More information can be found on the Minecraft Wiki at Tuff..

Tuff is an ornamental rock block, formed from volcanic ash, occurring in underground ore blobs.

Tuff
Item Details
TypeBlock

For additional information, please refer to the corresponding item in Vanilla Minecraft.

Obtaining

Tuff can be mined using a pickaxe. If mined without a pickaxe, it drops nothing.

Usage

Tuff is primarily used as a building block or can be traded for Common Repair Powder at Miner George.