This specific 3D model, "Solitaire Ring 3D print model 24", 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.
Native Formats: 3DM (Rhinoceros 3D, filesize: 6.52 MB)
Exchange Formats: OBJ (OBJ, filesize: 13.7 MB), FBX (Autodesk FBX, filesize: 1.67 MB), 3DS (3D Studio, filesize: 2.49 MB), STL (Stereolithography, filesize: 8.15 MB)