An emerald and diamond ring. photo Bonhams centering a rectangular-cut emerald with triangular-cut diamond shoulders and a plain mount; emerald weighing approximately: 4.50 carats; estimated total diamond weight: 1.60 carats; mounted in platinum; size...

René Boivin. An emerald and diamond clip brooch, France. Circa 1935. photo courtesy Symbolic & Chase The shield-shaped plaque composed of foliate sections set with brilliant-cut diamonds, interspersed with square-cut emeralds, to a central sugar-loaf...

A Belle Epoque emerald and diamond ring, by Cartier The square-cut emerald within an old-cut diamond surround to the calibré-cut emerald frame, diamond border and two-stone corners, circa 1915, in Cartier red leather case. Signed Cartier, No. Pt 97091....