Lot 192, a Colombian emerald and diamond ring. The octagonal step-cut emerald weighs 10.49ct, flanked by triangular-cut diamonds of approximately 2.00ct. Sold for £362,500  (estimate: £150,000-£200,000)

Lot 192, a Colombian emerald and diamond ring. The octagonal step-cut emerald weighs 10.49ct, flanked by triangular-cut diamonds of approximately 2.00ct. Sold for £362,500 (estimate: £150,000-£200,000).