This is such a fabulous Deco setting. It looks like the front of a Studebaker or other vintage car. And the side of the shank jets up like a skyscraper. It is a special bezel set Diamond of @ 0.40 CT. The Diamond is SI1 and color "G".
Please remember carat is a weight and not a size and so all size declarations are estimates unless we have removed the stone and weighted it for any reason.
The ring is very substantial size 6 and 5.9 grams of 18K gold. The item is hallmarked 750 for 18K. Unfortunately you can barely see the hallmark so I have acid tested the item and guarantee it to be 18K.
A significant ring that would be a treasure to own.