Check out Marble wall 239 3D model on CGTrader for $19. High-quality mesh by notfun: 100 polys, 100 vertices. Textured, UV Mapped.
STL (Stereolithography, filesize: 1.09 MB), OBJ (OBJ, filesize: 862 KB), MAX (Autodesk 3ds Max, filesize: 1.33 MB), FBX (Autodesk FBX, filesize: 1.29 MB)