Cracked Stone Brick

Cracked Stone Brick is a new block type that was implemented in the 1.8 Beta update. It can be found in Strongholds, which were also implemented in the 1.8 update.They can also be obtained if you destroy a stone brick

Trivia

 * It appears that, as of 1.8 pre-release, these blocks act like mushroom cap blocks, generating a differing texture once via location.