PBR Rock Stone Low-poly 3D model is available on CGTrader for $9. Original author: CgiArt. Specs: 7390 polys, 6932 verts.
OBJ (OBJ, filesize: 739 KB), FBX (Autodesk FBX, filesize: 876 KB), MAX (Autodesk 3ds Max, filesize: 1.64 MB), OTHER (Other, filesize: 15.9 MB), TEXTURES (Textures, filesize: 430 MB)