It's not one of my rings I'm araid. If I remember correctly somebody had posted and said that square stones didn't look right in vintage settings and I knew that wasn't correct so did a search for images. If that's a sapphire (and I think it is) try www.simplysapphires.com as I would have looked on there. If not, try a simple Google search for "square blue sapphire rings" or something like that. Sorry I can't be of more help.