The Moritz Amethyst and Cognac Diamond Cocktail Ring is a large 18 carat rose gold ring, featuring 11.80ct of amethyst and 0.38ct of cognac diamonds.Part of theCocktail Rings collection by Olivia Grace, which features semi-precious stones such asamethyst, citrine, peridot and aquamarine, reimagining the luxury and vintage glamour of the 1920s.