AN EMERALD AND DIAMOND NECKLACE Designed as an octagonal plaque, centring a cabochon emerald weighing approximately 4.50cts, between triangular-cut diamonds of brown tint, to a double-border set with brilliant-cut diamonds of brown tint and brilliant-cut diamonds, suspended from a bi-coloured flat curb-link chain, enhanced to the front with single-cut diamonds, mounted in 18K gold, diamonds approximately 5.00cts total, length 41.5cm