An art deco sapphire and diamond brooch, circa 1925. Photo Bonhams.

designed as an openwork pavé-set diamond plaque of geometric design, centering a cushion-cut sapphire, weighing 5.68 carats; estimated total diamond weight: 2.70 carats; mounted in platinum; length: 1 3/4in. (one diamond deficient). Sold for US$ 137,000 (€99,253)

Accompanied by Swiss Gemmological Institute (SSEF) report #65208, dated October 3, 2012, stating the sapphire as: Kashmir origin, with no indications of heating.

Accompanied by AGL report #CS 82347 and letter dated October 16, 2012, stating the sapphire as: Classic Kashmir origin, no indications of heat or clarity enhancement.

Bonhams. FINE JEWELLERY. New York, 9 Apr 2014 - www.bonhams.com