This specific 3D model, "Jewelry ring 198 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: 2.24 MB), OBJ (OBJ, filesize: 12.7 MB), FBX (Autodesk FBX, filesize: 1.57 MB), 3DM (Rhinoceros 3D, filesize: 13.4 MB)