Tuff

Tuff is an ornamental rock formed from volcanic ash, occurring in underground mineral veins below Y=16.

Breaking
Tuff drops as an item if mined by any pickaxe. If mined without a pickaxe, it drops nothing.

Natural generation
Tuff can generate in the Overworld in the form of mineral veins. Tuff attempts to generate 2 times per chunk in veins of size 0-862, from elevations -63 to 16, in all biomes. Tuff can replace stone, diorite, andesite, granite and deepslate.

Any diamond ore, gold ore, iron ore, lapis lazuli ore or redstone ore that generates in tuff will become its deepslate variety.

Usage
Tuff is currently used only for decoration.lol

Issues
Toba Tuffstein Tuf Tufo Tuff Tuf Tufo Туф 凝灰岩