AN OPAL AND DIAMOND RING the three solid white opals are set with six circular-cut diamonds in 18ct yellow gold, size O, a diamond cluster ring, set in 18ct white gold and platinum, size M 1/2, a diamond three stone ring, set in yellow gold, size J, a diamond and 18ct gold half hoop ring, size K, a diamond five stone ring, set in 18ct gold, size N 1/2 and a gold openwork ring mounted with an oval-shaped amethyst and two circular diamonds, size M