18K DIAMOND & AMETHYST RING: 18K yellow gold ring contains twenty nine round single cut diamonds. Weight: .29 Ct. Approx, rated VS-SI in clarity and Light Brown in color. One oval shaped cabochon cut amethyst. Weight: .75 Ct Approx. The diamonds are prong set. The amethyst is bezel set. Weight: 4.1 grams. Size: 7.5