A tanzanite and diamond cluster ring in 18ct white gold; centred with a large oval-cut tanzanite of intense purplish-blue colour, measuring approximately 12.8 x 10.0 x 6.8 mm, encircled with twelve round brilliant-cut diamonds with an estimated total weight of 1.72ct, to a D-profile shank, signed 'Iliana', Sheffield assay marks, ring head 2.1 x 1.9 cm, size N, 6.2 grams.