AN OPAL AND DIAMOND THREE STONE RING the oval-shaped solid white opal is set with two circular-cut diamonds in 18ct yellow gold, size R, together with a diamond three stone ring, set in 18ct white gold, size O, a diamond three stone ring, set in 18ct yellow gold, size S, a sapphire and diamond marquise-shaped cluster ring, set in yellow gold, size I 1/2, and an opal and diamond ring, the three circular solid white opals are set with four circular-cut diamonds, in yellow gold, size P