Geology is a mod that adds dozens of rock types and realistic ore minerals to the game. Over a hundred hours of research have gone into determining how everything works.
In addition to that, there are cracked (basically cobblestone), polished, and bricks versions of the rocks which can be used for building and such.
Blocks in the mod
Boulders
There is no world generation or crafting recipes because this mod is intended to be used by modpack developers who will be able to use custom scripts to spawn the different blocks from this mod.
Stairs, slabs, and multiple sets of stone tools will be added in a future update.