Diorite

Diorite is a block released in the 0.9.0 update of Minecraft Pocket Edition. It is similar to stone and has the same crafting recipes as stone in a stonecutter.

Spawn
Diorite, like Andesite and Granite, spawns similar to gravel, so, it may appear in large veins underground. It may sometimes also be found on the surface or on the side of mountains.

Crafting

 * 2 Cobblestone + 2 Quartz = Diorite
 * 4 Diorite = 4 Polished Diorite (in stonecutter)
 * 4 Diorite = 4 Stone Bricks

Trivia

 * Dirote was added to Minecraft PC in 1.8, but were released in PE before PC.
 * Diorite, along with Granite and Andesite spawn more often on the surface than stone (with the exception of the Extreme Hills Biome).