Victorian Opal and Diamond Cocktail Ring 14k Yellow Gold.  This fine Victorian cocktail ring features a lovely .40 carat oval shaped opal set in 14 karat yellow gold. Wreathed in a halo of Old Mine cut diamonds, this antique ring has been polished and skillfully brought back to life to dazzle like the day it was created. The opal is prong set and has brilliant flashes of blues and greens.