methods are disclosed for making artificial rocks and wood . in one embodiment , the method is comprised of the following steps : making a mold that has the shape and surface texture of a rock or wood ; applying cementitious material within the mold , the cementitious material including acrylic and / or resin - modified cementitious material ; applying a hardcoat on the cementitious material ; allowing the cementitious material and hardcoat to harden ; and removing the mold , the hardened cementitious material and hardcoat having the shape and surface texture of rock or wood .