This specific 3D model, "Women Ring MTL 3dm STL OBJ FBX Details 3D print model 47", is an asset made available by "Unknown author".
Can be downloaded at "Unknown platform" by following the link.
The license for this digital asset is "Unknown license".
STL (Stereolithography, filesize: 7.22 MB), OBJ (OBJ, filesize: 19.3 MB), 3DM (Rhinoceros 3D, filesize: 7.36 MB), FBX (Autodesk FBX, filesize: 3.26 MB)