This specific 3D model, "3ct Emerald Stone Cathadral Ring 3D print model purchase", is an asset made available by "Unknown author".
Can be downloaded at "Unknown platform" by following the link.
Usage of this 3d asset is subject to the "Unknown license" agreement.
STL (Stereolithography, filesize: 17.5 MB), OBJ (OBJ, filesize: 27.6 MB), 3MF (3D Manufacturing File, filesize: 917 KB), MP4 (MP4, filesize: 1.43 MB), 3DM (Rhinoceros 3D, filesize: 9.71 MB)