Offered for your consideration: Vintage Estate 5.3 Grams 18K Yellow And White Gold Two Tone Designer Ladies Ring.
You may notice I have a lot of photos showing the ring from all possible angles, as well as some photos showing the exact size and the weight of the ring. The ring as you can see has an engraving inside: it looks like M M 5-12-85. It could be May the 5th 1985 or perhaps if the ring was made somewhere in Europe it will be December the 12th 1985, in any case it is at least close to 40 years old. I will gladly answer any questions you may have, and if you should need additional photographs I will be glad to provide.