TOOGOO(R) Amethyst Gemstone Beads 6mm Round Purple 15.5 Inches for Jewelry Making,Design,Craft Gemstone / material:luscious deep purple royal amethyst. About 6mm in diameter. 15. 5 inch strand. 100% brand new and high quality. This gemstone strand of 6mm round amethyst beads is extremely consistent in size, shape and coloring.