you will get a solid, strong signal on it. The ID may bounce around a bit, due to changing angle of the coil relative to the ring, co-location of the ring with other stuff causing averaging, etc. I've found a few rings that bounced around from mid- to high-tone on my CZ's, usually bouncing Foil/Nickel, Nickel/Tab, and a couple that bounced Tab/Zinc (huge honking 10K men's bands).
If the ring is broken, it will give a weak, crappy signal, and be lower on the meter. You will only get about half the depth as if the ring were intact. This is an electrical inductance thing. An intact ring acts as a "one turn inductance loop" and gives off a much stronger signal than a solid piece of the same material of the same mass.
I've had the unfortunate luck to recover a few silver rings intact, only to break them at the weld during recovery. In air-testing afterwards, I noticed that the signal was weak, crappy, and would bounce Nickel/Tab on my CZ's. I've never found a broken gold ring, and I'm not about to break one that I already have, so I have no idea what a broken gold ring sounds like.
Also, this is the same reason why most detectors can not find find chains. The gold is low-conductive, and the broken loops just do not give off a good signal, unless there is a pendant attached. Large silver chains will come in with a Nickel/Tab bounce, and I've found several of those.
HH from Allen in MI