Check out low poly rock Low-poly 3D model get 3D model on CGTrader for $2. High-quality mesh by lukass12: 40 polys, 50 vertices. Textured, UV Mapped.
OBJ (OBJ, filesize: 1000 KB), 3DS (3D Studio, filesize: 1000 KB), BLEND (Blender, filesize: 2.03 MB), DAE (Collada, filesize: 1010 KB), FBX (Autodesk FBX, filesize: 1010 KB), OTHER (Other, filesize: 1000 KB)