Bye bye ring
I would use my hand Picker-upper-tool that is hanging in my kitchen and retrieve it.
I will fetch it and few other interesting things on way back.
I'd retrieve it before I flushed the toilet.
haha, did you still like the person who gave it to you? Perhaps take a photo and send it to them (was it number one or twos).
What kind of ring is it?...
I would destroy my plumbing looking for that hunk of metal...