This specific 3D model, "Light wt Ring Earrings Pendant set 3dm stl 1-render details 3D print model 13", is an asset made available by "Unknown author".
You can download this asset for free at "Unknown platform" by following the link.
Usage of this 3d asset is subject to the "Unknown license" agreement.
STL (Stereolithography, filesize: 72.4 MB), JCAD (JewelCAD, filesize: 365 KB)