Double Strand Turquoise Necklace Set with Crystal Bead and Larger Beads. Double strand turquoise colored beads on outer strand with thirty-four beads and inner strand having forty blue acrylic beads attached to large blue beads and a single strand of blue and clear crystal beads on silver colored chain. Necklace is 20 inches with matching earrings. Lobster claw clasp to finish up the job. This necklace is unique and very classy.