Check out Light Gold Diamond Men Ring 2MR040 3D model on CGTrader for $20. High-quality mesh by Bulgeri.
STL (Stereolithography, filesize: 16.4 MB), OBJ (OBJ, filesize: 39.5 MB), FBX (Autodesk FBX, filesize: 5.51 MB), 3DM (Rhinoceros 3D, filesize: 15.6 MB)