This specific 3D model, "Emerald Solitaire Ring With Hidden Halo 3D print model get", is an asset made available by "Unknown author".
Can be downloaded at "Unknown platform" by following the link.
The licensing terms for this digital asset are governed by "Unknown license".
STL (Stereolithography, filesize: 14.8 MB), 3DM (Rhinoceros 3D, filesize: 7.65 MB)