A Wonderful Antique 1920-30's Jade Art Glass Beaded Necklace, Vintage Art Deco. This beautiful antique necklace is composed of beautiful jade art glass beads measuring from about 14mm to 6mm. They are doen in wonderful Art Deco geometric shapes. The necklace dates to the Art Deco Era, circa 1920-30's. Overall the necklace is about 16 1/2 inches long. A wonderful antique find.