Stone is one of the common materials in Expedition. It is useful in starter tools and building Schematics. Stone is found in stone piles like all ores. Unlike most ores stone does not require a pickaxe to be mined, so you don't have to go though any trouble gathering materials to make a pickaxe. Also it can be crafted into Split stone similar to logs.
Stone is used as material for tools and Schematics. The following list of tools/items/buildings includes stone or split stone in the recipe: