A tanzanite and diamond ring

A tanzanite and diamond ring, the faceted cushion shape tanzanite centre weighing 6.77 carats claw set to half moon-cut diamond sides weighing in total 0.67 carats to a rub-over setting, all to a platinum mount with tapered shoulders, hallmarked platinum London 2014, bearing the Bentley and Skinner sponsor mark, gross weight 6.5 grams,

No. 26269V