This necklace is a combination of wire wrapping and bead stringing techniques.
You can create the three strands of purple beads by stringing them onto either soft-flex wire or thread and finish with bead tips. The ends of the strands are connected with jump rings to the large hammered metal rings. On the other side of the rings, attach three wire wrapped beads in sequence, and then attach a chain of your desired length. Add a clasp to finish the necklace.