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Five diamond brooches-tiara, circa 1890Estimate £3,000 - 4,000 (€4,100 - 5,500). Photo Bonhams

he graduated series of twelve-ray stars, each set throughout with rose-cut diamonds, detachable brooch fittings, tiara fitting provided, lengths: 5.6cm, 4.9cm, 4.9cm, 4.2cm, 4.2cm, fitted case 

Bonhams. JEWELLERY9 Sep 2015 11:00 BST - LONDON, KNIGHTSBRIDGE