Check out Light Gold Diamond Men Ring 2MR048 3D model on CGTrader for $20. High-quality mesh by Bulgeri.
STL (Stereolithography, filesize: 60.1 MB), OBJ (OBJ, filesize: 98.2 MB), FBX (Autodesk FBX, filesize: 14.8 MB), 3DM (Rhinoceros 3D, filesize: 57.6 MB)