Periwinkle Blue Venetian Glass 1920s Flapper Necklace. A rare and beautiful find, this fabulous 1920s flapper necklace is made from links of vibrant periwinkle blue Venetian glass. This 1920s flapper necklace is made up of an unusual shaped rectangular bead linked to a small round bead, a saucer bead and a small round bead. The pattern repeats the entire way around. The rectangular beads have a pattern of black, yellow, orange and red markings that vary throughout the necklace. You could layer this necklace with long or short red, yellow, cobalt or jet black beads for a more dramatic effect. With a total of 46 inches this necklace is a great accessory for a little black dress, long black tunic or Gatsby style drop waist frock. This necklace is in very good condition.