18ct Yellow Gold & Platinum Diamond and Black Onyx Plaque Ring Circa 1930

An extremely fine example of an 18ct. Yellow Gold and Platinum Art Deco Diamond and Black Onyx Plaque Ring, centrally "Rub Over Set", in the Floating Style, with on "Old Round Cut" Diamond, surrounded by approximately twenty four "Pave Set" "Single Cut" Diamonds, with beautiful Oval Open Strap Work settings. There are four pieces of Black Onyx set to each corner "Quarter Points". To either side of the Plaque there is a row of five "Pave Set" "Single Cut" Diamonds (ten in total). All Mille Grain Edged and on a fine 18ct Yellow Gold Shank.

English Circa 1930