Early 19th Century Table Cut Diamond Cluster Ring

Early 19th Century Table Cut Diamond Cluster Ring with Enamel Detail.  Central table cut diamond set in an open set collet with black enamel surround.  The central diamond is bordered by open set collets with rose cut diamonds.  Later but antique shank of 14K rose gold.  Silver diamond settings.  Size 8.5 can be sized.  Circa 1840. English