An oval sapphire and diamond cluster ring

An oval sapphire and diamond cluster ring, the oval faceted sapphire weighing 3.82 carats, claw-set to the centre of a cluster surround of ten round brilliant-cut diamonds, estimated to weigh a total of 2.6 carats, all claw-set to a raised white gold collet, to a tapered square-section shank with cheniered shoulders, hallmarked 18 carat gold, London 1981, gross weight 6.7 grams