Tuff

Tuff is a decorative rock found in underground ore blobs below Y=0. It generates in large patches and is commonly found near deepslate and ore veins, particularly with iron. Tuff can be mined with any pickaxe; otherwise, it drops nothing. It is primarily used for decoration and can be crafted into polished tuff, slabs, stairs, and walls. Placing it under a note block creates a 'bass drum' sound.