A sapphire and diamond cluster ring

A sapphire and diamond cluster ring, the oval-shaped faceted sapphire weighing 5.17 carats, millegrain rubover-set to the centre of a cluster surround of brilliant-cut diamonds alternating in size, weighing a total of 1.45 carats, all set to a platinum mount with pierced fancy gallery, to a square-section shank with diamond-set shoulders, hallmarked platinum, London 2008, bearing the Bentley & Skinner sponsor mark, gross weight 8.7 grams

No. 21811M