This specific 3D model, "Light Minimalist Diamond Ring 3D print model 29", 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: 128 MB), JCAD (JewelCAD, filesize: 585 KB)