A spinel single-stone ring. Photo Bonhams. The cushion-shaped spinel, weighing 8.50 carats, between oval-cut diamond shoulders, ring size N. Estimate £15,000 - 20,000 (€18,000 - 24,000) Accompanied by a report from SSEF stating that the spinel is of Burmese...

A cushion-shaped spinel and diamond ring, by Tiffany & Co., circa 1940 The cushion-shaped spinel, weighing approximately 14.0 carats, within a six-claw setting, each shoulder accented by French-cut diamonds, mounted in platinum, shank signed Tiffany &...

A pair of cushion-shaped spinel and diamond earrings Each cushion-shaped spinel, weighing 8.52 and 7.22 carats respectively, to a geometric frame set with brilliant-cut diamonds, suspended from a diamond surmount and hook, mounted in 18k white gold, earring...