Vintage Art Deco Onyx & Diamond Ring in Yellow GoldVintage Art Deco Onyx Diamond Ring in Yellow Gold. This dramatic right hand ring features cabochon onyx in a beautifully ornate yellow gold setting with a small bezel set diamond in the center. The metal on the ring is adorned with splendid engravings outside the bezel with chevrons patterned down the shoulders. A fine piece of mourning jewelry you will cherish in your collection.