Vintage 18kt HGE Silver Tone Faux Sapphire Diamond Cocktail Ring

This is a gorgeous cocktail ring. It is very hard to read the mark, but I would assume it's 18k electro plated gold. I tried doing a scratch test, but it wouldn't scratch. Since it's not real gold I would guess that the stones are faux and this is a beautiful piece of costume jewelry. I took photos of the mark too. It is used and has some light wear, but is in overall nice shape. Center faux sapphire measures 1/4" x 1/8". The face measures 7/8" x 5/8". Ring is size 6.25