14K white gold Art Deco filigree ring with black onyx and diamond. The black onyx rectangular slab is carved with a flower and has the diamond set in a flower shape. The onyx panel measures about 18mm x 9mm. The small round diamond accent measures about 1.7mm. The ring fits a size 4 1/2 finger and weighs 1.74dwt. It dates from the 1920's.