This specific 3D model, "Light Weight Pendant STL OBJ FBX JCD Details 3D print model 45", 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: 31.5 MB), OBJ (OBJ, filesize: 69.5 MB), JCAD (JewelCAD, filesize: 248 KB), FBX (Autodesk FBX, filesize: 9.64 MB), RIB (Renderman, filesize: 529 KB)