A 9.30 carat rectangular cushion African amethyst with 0.90 carats of round white topaz in 18K yellow gold over sterling silver ring - the African amethyst cocktail ring at its boldest scale. At 9.30 carats rectangular cushion in warm gold with a generous white topaz surround, this ring makes an unambiguous color statement. African amethyst's vivid saturated purple is one of the most reliably beautiful colored stone expressions. Not sizeable.