A late 19th century opal and enamel necklace

A late 19th century opal and enamel necklace, the pendant set with a graduated cluster of oval opal cabochons, green enamel and red and white enamel fleur-de-lys, suspended on a chain alternately-set with opals and figure of eight links decorated with polychrome enamel and diamonds, 37cm long, the pendant 4cm long, original fitted case