Vintage Sterling Silver Gold Plated Solitaire Ring with Cubic Zirconia, Size 5

A beautiful petite antique ring. I believe it's a size 5. It belonged to my mother, which is why I was uncertain about its origins. Very pretty and classic setting. Comment with more questions and I'll do my best to answer! Selling because it doesn't fit and I have other pieces of hers that do. Gold plated sterling silver!