A mid 19th century, diamond and enamel cross and serpent pendant,

A mid 19th century, diamond and enamel cross and serpent pendant,
the blue enamel cross with entwined rose-cut diamond serpent, the serpent with old-brilliant-cut diamond single stone detail and red gem set eyes, the cross with rose-cut diamond leaf design terminals and suspension loop, the cross reverse with engraved floral decoration, chip to enamel, circa 1850.
See plate 14