Lot 255. Platinum, 18 Karat White Gold, 80.25 carats Thailand Sapphire and 44.00 carats Diamond Necklace. Estimate 150,000 — 250,000 USD. Lot sold 181,250 USD. Photo Sotheby's

Set with 16 oval-shaped sapphires weighing approximately 80.25 carats, accented by round, pear and marquise-shaped diamonds weighing approximately 44.00 carats, length 14 inches.

Accompanied by AGL report no. CS 71009 stating that an excess of 50% of the stones tested at random are of Thai origin, with indications of heating. 

Sotheby's. Magnificent Jewels New York | 09 Dec 2015.