Tanzanite and diamond ring

A diamond and tanzanite ring by Iliana, the central oval-shaped tanzanite, measuring approximately 8.4mm x 6.5mm x 4.35mm, flanked by trios of brilliant and princess-cut diamonds, approximateky 0.40ct total, mounted in 18ct white gold, signed, stamped with UK hallmark, ring size N, total weight 5.10 grams.