Lot 273. Sapphire and diamond necklace, 1950s. Estimate 290,000 — 480,000 CHF (265,036 - 438,680 EUR). Photo Sotheby's

Composed of step-cut sapphires alternating with brilliant-cut diamonds, the front highlighted with brilliant-cut and baguette diamonds suspending an oval sapphire weighing 29.07 carats, length approximately 375mm. 

Accompanied by SSEF report no. 83394, stating that the sapphire weighing 29.07 carats is of Burmese origin, with no indications of heating. 

Also accompanied by SSEF report no. 84332 and Gübelin report no. 16030198, stating that the seven sapphires at the front weighing from 5.30 to 6.43 carats, are of Kashmir origin, with no indications of heating.

Sotheby's. Magnificent Jewels and Noble Jewels, Geneva, 17 May 2016, 10:00 AM