Sandstone is the weakest of all the stone blocks on Minecraft. It can even be broken by Ghast fireballs, a feat which only Netherrack and Glowstone match. Sandstone is found in Desert Biomes and Beaches a few blocks below the surface level of Sand, but otherwise can be crafted in the same manner as Bricks and Nether Bricks with 4 Sand. Sandstone is found making up desert NPC Villages as well. Like all of the basic building materials, it can be crafted into stairs and Slabs.
Chiseled Sandstone is a form of Sandstone that is made from Sandstone Slabs. Two are placed on top of each other. Chiseled Sandstone has a Creeper face on it and can be found naturally in Desert Temples or Desert Wells.