Jewellery, Watches and Objects of Vertu

A star sapphire and diamond ring and a tanzanite and diamond ring, the first set with oval star sapphire cabochon between brilliant-cut diamonds, the second, claw set with oval-cut tanzanite between bifurcated wraparound shoulders each with a brilliant-cut diamond highlight, mounted in 18ct gold, UK hallmark, both ring sizes M. (2) £300-£500