Purple Amethyst Rice Beads are reconstructed man-made amethyst beads. Amethyst is the most recognizable and desirable form of quartz because of its purple hued translucent crystal structure. These beads are 16mm long and 6mm diameter and are thickest at the center tapering gently to the ends. Beads are drilled through the center along the long axis of the bead. These beads are smooth beads with a polished silky luster.