Art Deco pieces with emeralds seem especially tricky to find at the moment. When I happened upon this (in stick pin form) I couldn't resist it. 
A strike of calibre cut emeralds, surrounded by a swirl.of rose cut diamonds, and perfectly punctuated with a cultured pearl. All set in 18ct gold and platinum millegrain settings. The Deco dream! 
Stamped and tested as 18ct gold and platinum. 
Weight approx 0.80g
Total drop approx 22mm
Width approx 8mm
Very good antique condition