Vintage Art Deco Lady's 14K Yellow & White Gold Diamond & Ruby Ring. Ring Size: 6 3/4. Nine Natural Round Cut Diamonds weighing approx. 0.75cttw. Twelve Round Cut Rubies. Here is a beautiful ring from the quickly growing collectible style known as Retro, which is kind of in-between Art Deco and the Second World War. There are still bargains in these pieces, which I feel will be good investments as time goes on. I do not have an appraisal for this piece because it is an antique and is collectible. The gemmological value is not a great determining value of actual worth.