Cobblestone

Cobblestone is a darker block, often looking like a roughly paved area. This block only occurs naturally in dungeons. It makes great walls for constructions such as castles, towers and roads. In the survival and indev/infdev modes, you obtain cobblestone by mining stone. Cobblestone is slightly harder to mine than normal stone, and there is an alternative version of the block known as Mossy Cobblestone.

There is a tutorial on how to make a cobblestone factory here.

History
Cobblestone was issued in the first version of Minecraft or when it was just a clone of Infiniminer. It's textures are from one of Notch's previous games called RubyDung. Cobblestone was removed in 0.0.19a, but returned in 0.0.20a. It was removed due to lack of room in the UI. Because of its dark color it was often used in pixel art to represent darker colors until other, darker blocks like black cloth and obsidian appeared.

As of 1.2.0, Cobblestone has a new perk introduced to it. It serves as an indestructible block against Ghast fireballs. It takes no damage, so players are recommended to carry it with them to create shelters out of if they find themselves swarmed by Ghasts. It will not stop radius damage from getting to the player though, and it can still be set on fire from the top. Thus, one should consider to have plenty of space if they are trying to block a Ghast fireball.



Pflasterstein