This specific 3D model, "Women ring 3D print model 170", is an asset made available by "Unknown author".
You can download this asset for free at "Unknown platform" by following the link.
The licensing terms for this digital asset are governed by "Unknown license".
STL (Stereolithography, filesize: 3.81 MB), 3DM (Rhinoceros 3D, filesize: 2.83 MB)