An emerald and diamond pendant necklace

The bi-colour openwork pendant, to a central line of claw-set brilliant cut diamonds and circular-cut emeralds, shouldered by collet-set brilliant-cut diamonds, mounted in 22 carat yellow and white gold, to a cascade chain, diamonds approx. 0.44 carat total, maker's mark 'WW' on the pendant, UK hallmarks, lengths: pendant 2.9cm, chain 42.0cm