Beadwork is the art or craft of attaching beads to one another by stringing them onto a thread or thin wire with a sewing or beading needle or sewing them to cloth. Beads are produced in a diverse range of materials, shapes, and sizes, and vary by the kind of art produced. Most often, beadwork is a form of personal adornment (e.g. jewelry), but it also commonly makes up other artworks. Native American beadwork, already established via the use of materials like shells, dendrite, claws, and bone, evolved to incorporate glass beads as Europeans brought them to the Americas beginning in the early 17th century. Native beadwork today heavily utilizes small glass beads, but artists also continue to use traditionally important materials. Wampum shells, for instance, are ceremonially and politically important to a range of Eastern Woodlands tribes, and are used to depict important events.