This specific 3D model, "Solitaire Super Light Weight Earring Pendant Set 3D print model 10", 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: 10.5 MB), OBJ (OBJ, filesize: 24.1 MB), FBX (Autodesk FBX, filesize: 4.08 MB), 3DM (Rhinoceros 3D, filesize: 6.91 MB)