An emerald and diamond necklace. Photo: Christie's Images Ltd 2010 Designed as a graduated series of cushion-cut emeralds, each within a circular-cut diamond surround, spaced by collet-set diamonds, to the circular-cut diamond clasp, mounted in platinum,...

A jadeite jade, garnet and plique-à-jour brooch, Louis Comfort Tiffany, circa 1910 © 2002-2009 Bonhams 1793 Ltd centering an oval cabochon jadeite jade, within a surround of circular-cut garnets and accented with enamel detail; signed Tiffany & Co; mounted...