Star sapphire and diamond ring - Photo Sotheby's

Set at the centre with a cabochon star sapphire, within a bombé mount set with brilliant-cut and baguette diamonds, size L, French assay marks. Estimation: 4,000 - 6,000 GBP. Lot. Vendu 34,850 GBP

Sotheby's. The Jewellery Collection of the Late Michael Wellby: An Eclectic Eye - Jewels Spanning Four Centuries. London | 11 déc. 2012 www.sothebys.com