A yellow sapphire ring. Photo Bonhams

centering a cushion-shaped yellow sapphire, measuring approximately 19.7 x 15.8 x 10.5mm., within a pierced scrollwork mount; with signed box from A La Vieille Russie; estimated yellow sapphire weight: 26.00 carats; mounted in eighteen karat gold; size 5 1/2. Estimate €23,000 - 31,000

Accompanied by AGL report #CS53267, dated February 1st, 2013, stating that the natural yellow sapphire is of Ceylon (Sri Lanka) origin, no evidence of heat or clarity enhancement.

Provenance: Purchased by the collector at A La Vieille Russie, New York, in 1997.

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