A Sri Lankan sapphire and diamond necklace. Photo Bonhams.
The front designed as a series of oval-cut sapphire and marquise and brilliant-cut diamond clusters, with a principal brilliant-cut diamond, weighing 2.60 carats, at the centre, suspending a detachable pendant set with a large oval-cut sapphire, weighing 57.13 carats, within borders of brilliant-cut diamonds, the highly articulated backchain composed of rows of circular-cut sapphires and brilliant-cut diamonds, remaining diamonds approximately 23.70 carats total, necklace length 42.3cm. Estimate £60,000 – 80,000 (€76,000 – 100,000)
Accompanied by a report from Gübelin stating that the sapphire weighing 57.13 carats is of Sri Lankan origin, with no indications of heating. Report number 14070058, dated 8 July 2014.
This report has an additional information sheet from Gübelin explaining the rarity of large gem-quality sapphires.
Bonhams. FINE JEWELLERY, INCORPORATING THE CERES COLLECTION, LOTS 1 TO 101; A COLLECTION OF CAMEOS & INTAGLIOS FORMED BY AN AMERICAN FAMILY FROM THE 1930S TO THE 1990S, London, New Bond Street; 17 Sep 2014 14:00