Andesite

Andesite is a block confirmed to be released in the 0.9.0 update of Minecraft Pocket Edition, it forms similar to gravel, so it will appear in large veins underground, and sometimes be above ground too.

Crafting
You need one cobblestone and one Diorite to craft Andesite. You use four Andesite to make Polished Andesite. These Items will probably be crafted in the stonecutter.

Trivia

 * These blocks are also coming in the 1.8.0 update for PCPolished_Andesite.png