This undulating bracelet is made entirely with sterling silver wire and 4mm crystals. Each curve of the bracelet is wrapped with crystals on very thin wire and then all the curves are joined with sterling silver rings. The closure is a hook on one end of the bracelet that attaches to a wrapped curve. I can make the bracelet in virtually any combination of crystal colors. If you would like a color that I haven't listed, just give me a call to order.