This is a modern deco style enamel & sterling silver pendant on a silver neck chain. The pendant measures 54mm tall and 39mm wide. Weight is 17.5 grams.
It has enamel in shades of blue & mauve. You can remove the chain and wear it as a brooch (pin on back). The pendant is marked "925", and also with the makers initials "PPC" (Pat Cheney). The sterling neck chain measures 23 inches long. Condition of both pieces is excellent and original.