Our beautiful Grade A Fiber Optic (Cat's Eye Beads) display a perfectly centered chatoyant "Cat's Eye" effect. These top quality beads start out from the same material used for fiber optic telephone cables. The glass fibers are fused together and then machine cut into innumerable shapes and sizes. The cat's eye effect of these beads is a result of light reflecting off the edges of the glass fibers at the surface of the bead. This bead features a generous hole size of 5mm, opening up a wide range of stringing options!