Not bad But it could be a little better…the gold material would look better if it had something to reflect, and the lighting is a little flat…you could also try out cycles!
This is rendred with cycles
Seems a little dark to me. Perhaps some glare on the diamond. The gold should be shinier and have something to reflect. Also, what is holding the diamond to the ring? I don’t see any supports. The ring itself looks too round like you scaled a torus or something. Rings are usually flat on the inside and round on the outside with a clear edge between the inside and outside.
Looking forward to seeing a new version.