Opal Diamond Halo Cocktail Ring in Sterling Silver.  The opal in this modern ring just glows! The 2.05 carat cabochon stone has wonderful play of color that flashes blue, green and orange. This stunning opal is framed by a halo of baguette cut diamonds in an alternating pattern that gives dimension to the design. The black color of the oxidized silver helps to make the colors of the opal really pop.