A pearl and diamond necklace, circa 1860. photo Bonhams

The front set with series of quatrefoil diamond plaques and buckle-shaped links, set throughout with old brilliant and rose-cut diamonds, accented throughout by pearls of gray, pink, orange, purple and yellow hue, to a diamond-set back chain, mounted in silver-topped gold, diamonds approximately 26.00 carats total, pearls untested for natural origin, with fitted case, necklace length 38.1cm. Sold for HK$456,000

A pair of conch pearl and diamond earrings. photo Bonhams

Each surmount set with a white and pink conch pearl and brilliant-cut diamonds, terminating in a light pink conch pearl drop, within a pear-shaped border of similarly-cut diamonds,mounted in platinum and 18k white gold, earring length 6.1cm. Sold for HK$240,000