Stone Bricks

Stone Brick is a new block type that was implemented in the 1.8 Beta update. Stone Bricks are one of the materials that are used in the Strongholds.

Stone brick the player crafts appears to have a very small chance of turning into Cracked Stone Brick. When harvested it has all the behaviors of Cracked Stone Brick but still says Stone Brick in the tooltip. It's unclear if this is a glitch or intentional.

Crafting
Stone Bricks can be crafted by placing 4 Stone blocks in a square.

Trivia

 * In the file "en_US.lang" is a reference to this block "tile.stonebricksmooth.name=Stone Bricks".
 * The insect mob known as Silverfish spawn from Stone Bricks.