An emerald and diamond dress ring. Photo: Bonhams. The step-cut emerald, weighing 4.08 carats, within a surround of brilliant and marquise-cut diamonds, diamonds approximately 1.50 carats total, ring size I½. Estimate £8,000 - 10,000 (€9,700 - 12,000)...

An emerald and diamond dress ring. Photo: Bonhams. Set with a large cabochon emerald between triangular-cut diamond shoulders, emerald approximately 27.00 carats, diamonds approximately 0.70 carat total, ring size N. Estimate £12,000 - 15,000 (€15,000...