Angryverse/Stone

Stone is one of the three main materials used by the pigs for constructions, it is the most sturdy and heafty resource the pigs have, they're most commonly originated from areas like caves and mountains where there are tons of rocks.

In a more advanced age of advanced technology, stone will probably be replaced by a much better and shinier material known as iron.

Angry Birds Dream Blast
Stone, also known as Rocks, shows up in Level 21.