The listing, Onix and silver ring has ended.
This ring is pretty old, though I don't know the age, I am twenty four now and I remember my mother wearing this ring when I was very small. In the second photo I am wearing this ring on my ring finger and I wear a size 5 1/2 and it fits well so my best assumption is that it is a 5 1/2. It has a unique and pleasant design around the base of the gem(shown in pictures two and four) and in pictures five, six and seven I tried to capture the print on the inside of the ring I am not sure if it is clearly visible but I will write what I can read the first symbol in the ring is hard for me too discern but the second word says, "ster." I would assume this means that it is sterling silver but I cannot be positive about this. So be aware that this is my assumption and not something that I actually know.