Hi everyone, so I have an old ring that was supposedly my great grandmothers, according to my grandmother, and I have been trying to find out what the only marking on it means. I've searched everywhere but can't find anything about it, I don't know if it is real or fake, I just want to figure out what it is since it has been bugging me. Any help would be much appreciated. Thanks in advance! I don't know if that's the right way around or if it is supposed to be flipped over, but I'm assuming that's the correct orientation.

