A Gorgeous Antique Blue Zircon and Black Onyx Wedding Ring, Rare Art Deco circa 1920. This beautiful example of the Art Deco Era holds a faceted natural blue zircon at its center measuring about 7mm in diameter. Blue zircon is often compared to blue diamonds. The zircon is set into a gold bezel and then set into a faceted black onyx gemstone. The setting is composed of yellow gold and has wonderful Art Deco period detailing. Overall the ring measures about 9/16 inch long by about 11/16 inch wide from side to side. Ring Size: about 5 3/4 (could be resized by your jeweler or ask me about using mine before shipping). This ring was acquired through an estate collection and is in lovely vintage condition with wear to the facets of the blue zircon. A rare find.