Vintage Cocktail Ring 18k GE Black Onyx Faceted Square Stone Women's Size 6

This is a lovely vintage gold ring with a square stone of faceted black onyx. The ring features an 18k gold electroplate and the stone is set high in a 4 pronged setting. As you can see, there are some scratches and spots where the plating has rubbed off. It's not very noticeable when wearing. Ring size 6