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 having the skin change to Cracked Stone Brick or Mossy Stone Brick when harvested. It's unknown if this is a glitch or intentional. The same phenomenon also happens with harvested Stone Brick Stairs.

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 blocks identical in appearance to Stone Bricks.
 * You can also mine another type of a "Normal" Stone Brick (Neither Mossy nor Cracked), if you mine it from the Stone Brick Stairs

Bugs
With Stone Brick Stairs, it is possible to mine three different types of blocks depending on the direction you are facing while placing them: It is to assume that this is due to the stairs' damage value (representing the direction it's facing) being reused in the dropped block's (representing the type of stone brick, see Data values).