Infested Stone Bricks are a trap block in Minecraft that look identical to ordinary Stone Bricks but hide a silverfish inside. Breaking the block without the Silk Touch enchantment spawns a silverfish that emerges to attack the player, and the noise can wake nearby infested blocks into a whole swarm. Infested Stone Bricks generate naturally throughout Stronghold rooms, mixed in with the regular stone brick walls and floors, so players cannot tell them apart by sight. Like every infested block, they have a low hardness of 0.75 and break much faster than the real Stone Bricks (hardness 1.5) they imitate — this unusually quick mining speed is the main clue that a block is infested. A pickaxe breaks them fastest, but mining one normally yields no item and releases the hidden mob. A pickaxe with Silk Touch lets you collect the block intact with no silverfish, which is the only safe way to obtain it. Infested Stone Bricks were added in Beta 1.8 as part of the original monster egg blocks and received their current ID, minecraft:infested_stone_bricks, in the 1.13 update. They exist in both Java and Bedrock Edition and belong to a family that also includes infested mossy, cracked, and chiseled stone bricks.