Every once in a great while I see Art Deco necklaces with a "bubble" design but most are enamel. This one is quite unique in that it features a central pentagon shaped aqua marine glass stone which is prong set in geometric framework. The silver bubble design is a nice contrast to the architectural shape of the medallion. It measures 17 1/2" end to end. The silver base metal chain is very nice and closes with a detailed deco safety clasp. A gorgeous and unique piece of Art Deco jewelry. Very slight wear to the finish on the reverse of the framework in which the stone is set. Otherwise lovely condition.