my grandmothers ring

I believe this to be one of my grandmothers rings, I think maybe from the 30's, I have been told that the stones are garnet and diamond but the shank seems to have been repaired over the ages, (maybe from my mum) and seems to be copper (not sure) It seems to me to be a bit of a mongrel, but I love that because it represents how tough my grandmother was, her mother died when she was two and her father murdered at 15, she married in 1932 and had 11 children and her husband died when the youngest was 2 and she kept them together in Australia in a time where there was no government assistance. I am thinking of replacing the shank with gold from my mothers and my own wedding rings to make it into a real family piece... love to know what you think... not sure what the name of the setting actually is.