A pair of opal and diamond earrings

A pair of opal and diamond earrings and a cultured pearl, opal and diamond necklace, the earrings of drop design, composed of a cabochon opal within a border of brilliant-cut diamonds, suspended by a gold knife wire link from a diamond surmount, length 3cm each, post fittings; the two-row cultured pearl necklace with a clasp set with a cabochon opal within a border of cushion-shaped diamonds, length 40cm