A Belle Epoque Sapphire and Diamond Tiara. Photo Christie's Image Ltd 2014

The base designed as an openwork wreath of diamond-set laurel leaves, centering upon a circular-cut diamond collet, surmounted by a series of graduated cushion-shaped sapphires in diamond-set clusters, a diamond-set wavy line and alternated diamond and sapphire collets on top, 1910s – Estimate: CHF200,000 – CHF300,000 ($226,739 – $340,108)

Christie's. GENEVA MAGNIFICENT JEWELS.14 May 2014. Geneva