Two South Sea cultured pearl and diamond necklaces, Bulgari. Photo courtesy Bonhams

A South Sea cultured pearl and diamond necklace, Bulgari. Photo courtesy Bonhams

composed of thirty graduated white cultured pearls, measuring approximately 15.50 to 14.90mm., completed by a pavé-set diamond boule clasp; unsigned, with signed case; estimated total diamond weight: 4.50 carats; clasp mounted in platinum: length: 20 7/8in. Estimate US$ 25,000 - 35,000 (€20,000 - 27,000)

Provenance: Purchased as a nest with lot 55 by the collector from Bulgari, New York, in December 1996.

A South Sea cultured pearl and diamond necklace, Bulgari. Photo courtesy Bonhams 

composed of twenty-nine graduated white South Sea cultured pearls, measuring approximately 15.0 to 14.0mm., completed by a pavé-set round brilliant-cut diamond boule clasp; signed Bvlgari, with signed case; estimated total diamond weight: 3.65 carats; clasp mounted in platinum; length: 18 3/4in. Estimate US$ 20,000 - 30,000 (€16,000 - 23,000)

Provenance: Purchased as a nest with lot 54 by the collector from Bulgari, New York, in December 1996.

Bonhams. 15 Apr 2013. New York. A Prominent Private Collection of Fine Jewelry.