An 18ct bi-coloured gold diamond and tanzanite dress ring, featuring an oval fancy cut tanzanite with bright purplish-blue body colour, approximately measuring 11.0 x 7.8 mm, claw set on a cathedral mount, embellished with marquise and round diamonds on the bifurcated shoulders, tapering to a flat shank, Birmingham hallmarked '750' with maker's mark 'LORIQUE', dated 2016, ring size O, total weight of item 4.8 grams.