This specific 3D model, "Women Earrings 3dm STL OBJ FBX Render Details 3D print model 12", 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: 19 MB), OBJ (OBJ, filesize: 61.2 MB), FBX (Autodesk FBX, filesize: 7.41 MB), 3DM (Rhinoceros 3D, filesize: 26.3 MB)