Check out Ancient Stones Pack Low-poly 3D model on CGTrader for $29. High-quality mesh by Adrian-Kulawik: 19246 polys, 10682 vertices. PBR, Textured, UV Mapped.
BLEND (Blender, filesize: 159 MB), OBJ (OBJ, filesize: 42.5 MB), FBX (Autodesk FBX, filesize: 4.02 MB), TEXTURES (Textures, filesize: 136 MB)