Large Hole Beads (Greek Ceramic Beads, Glazed Bronze): Ceramic tubes, Glazed Bronze, 6mm x 17mm. While the color is exceptionally hard to wear off glazed beads due to the high temperature used when firing the glaze onto the ceramic base, glazed beads nevertheless tend to chip more readily than other ceramic beads. Small chips may exist. These beads are very individually shaped--not for perfectionists.