14K AMETHYST & DIAMOND RING: 14K yellow gold ring contains natural and synthetic amethyst. Weight: approx. 12.00 Ct. 68 round single-cut diamonds. Weight: approx. .33 Ct. Rated SI in clarity and H-I in color. The amethyst are prong and channel set. The diamonds are prong set. Total weight: 9.3 grams. Size: 7.