Lot 167. A natural pearl and diamond necklace. Estimate GBP 100,000 - GBP 120,000 (USD 132,800 - USD 159,360). © Christie's Images Ltd 2017

Composed of five rows of 90, 93, 96, 104 and 106 natural pearls, measuring approximately 3.60 - 8.35mm, to an old-cut diamond openwork twin trefoil and scroll design panel clasp, panel circa 1910 later converted to a clasp, 52.0cm.

Accompanied by report no. 81545 dated 31st August 2015 from the SSEF Swiss Gemmological Institute stating that the analysed properties confirm the authenticity of these saltwater natural pearls

Christie's. Important Jewels, 29 November 2017, London