Looking for Monolith group of stones? Get this 3D model from rxrivaz via CGTrader for $2.28. Technical specs: 137619 polygons, 69191 vertices.
STL (Stereolithography, filesize: 6.56 MB), OBJ (OBJ, filesize: 12.1 MB), DAE (Collada, filesize: 18.3 MB), FBX (Autodesk FBX, filesize: 5.95 MB)