13 mm triangle milk glass with blue beads

These vintage German beads were made in the late 1950s or early 1960s. They are unusual because each side of the bead is flat. There are three flat sides. Each bead has what can only be described as a blue ghost inside. The overall color is a milk white with some iridescence. There is a sapphire blue shadow inside each bead. The bead channel will accommodate a 0.5 mm string. The bead is 9 mm wide. Price is for 10 beads.