Infested Cobblestone
minecraft:infested_cobblestone
A placeable block. Made using a Cobblestone rather than crafted directly.
How to get it
No direct recipe — it's made using a Cobblestone:
Stonecutter 
→
Cobblestone
minecraft:infested_cobblestone
A placeable block. Made using a Cobblestone rather than crafted directly.
No direct recipe — it's made using a Cobblestone:
Cobblestone