Stoneblocks are used to construct a wide variety of buildings, particularly in the Iron age. They are particularly useful for constructing Stone Platforms, an upgraded version of Wooden Platforms, and Stoneblock Walls, which are the sturdiest walls.
Stoneblocks are produced by the Quarry an annex of the Stonecutter camp. The quarry for stoneblocks can be placed anywhere as long as the 2x2 spot only contains a single type of stone. Stoneblocks can also be mined out of Limestone, Marble, Sandstone, Schist and Basalt formations.