A group of sapphire and diamond jewellery. Photo Christie's Image Ltd 2013

The necklace designed as a line of graduated oval-shaped sapphires with diamond-set crossover spacers, to the detachable oval-shaped sapphire and brilliant-cut diamond pendant of later addition, together with a pair of oval-shaped sapphire and brilliant-cut diamond earrings, mounted in gold, necklace 43.0 cm, earrings 3.0 cm(3). Estimate CHF30,000 – CHF50,000

Christie's. MAGNIFICENT JEWELS. 15 May 2013. Geneva