This Juliana white multi colored cabochon brooch / pendant with aqua navettes and ab clear and ab blue chatons is 2 1/2" x 2 3/16". These are often refered to as 'Easter egg" brooches. It is in excellent condition. Circa 1963.
Reference : Juliana Jewelry Reference, Identification and Value guide, by Ann Pitman, Collector Books, 2010 pp26.