A brooch and two pendants, late 19th/early 20th century, comprising: a brooch, designed as a snake

A brooch and two pendants, late 19th/early 20th century, comprising: a brooch, designed as a snake applied with green and black enamel, its head set with cushion-shaped diamonds, coiled around a wishbone, mounted in silver and gold, length 4.6cm; a gold and painted enamel crucifix pendant, pendant length 5.6cm including bail, chain length 44cm, British hallmarks for 9ct gold; and a lozenge-shaped openwork pendant of foliate design, set with seed pearls, circular-cut emeralds and rose- and brilliant-cut diamonds, mounted in gold and platinum, pendant length 3.7cm, Russian 56 zolotnik mark, chain length 38cm, French export assay mark for 18ct gold, French maker's mark, pearls untested