Antique Right Hand Ring Art Deco .48 Old Mine & Single Cut Diamonds in PlatinumDinner rings, like this art deco piece, are distinguished by their elongated North South shape. Popularized in the 1920s, pieces like this were often worn to cocktail or dinner parties. Cast in platinum this ring has a stunning geometric shape and is adorned with . 48 carats of old mine and single cut diamonds. This ring makes a lovely right hand ring or a even as a unique engagement ring.