This specific 3D model, "Light wt Ring Earrings Pendant set stl jcd 1-render details 3D print model 50", 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: 81.9 MB), JCAD (JewelCAD, filesize: 752 KB)