The listing, Vintage Blue Faceted Ring with 'Diamonds' has ended.
The stone including the 'diamonds' are 1/2". I couldn't lay it straight, but from a paper chart it looks like size 8 1/2. I'm not a jewelry expert, so all I can tell you is that this is a light blue faceted stone that is open in the back. I don't believe the stones around it are diamonds (but I could be wrong). It is silver, but I can't make out if it is sterling. It does have what I believe to be three numbers stamped on the inside, but I just can't make it out. It could very well be sterling, but I don't want to assume. All the stones are present, and I don't see any chips on it. It does need cleaning.