An Art Deco Egyptian Revival emerald, carnelian, glass intaglio and diamond necklace, circa 1925

An Art Deco Egyptian Revival emerald, carnelian, glass intaglio and diamond necklace, circa 1925, set with an oblong reverse glass intaglio depicting an ancient Egyptian figure carrying an urn, within a geometric openwork border of carnelian, step-cut emeralds and circular-cut diamonds, to a fancy link chain necklace set with circular-cut diamonds, the bolt ring clasp set with additional rose-cut diamonds, mounted in platinum, necklace length 38cm, pendant length 5.6cm