Chakra Jewelry, Natural & Synthetic Gemstone Beaded Necklaces, with Brass Magnetic Clasps, Natural Lava Rock, Size: about 18.5 inch (47cm) long, bead: 8mm; clasp: 14x8mm.The beads of necklace include natural Lava Rock, natural red agate, natural tiger eye, natural imperial jasper, synthetic turquoise, natural lapis lazuli, natural amethyst, resin imitation amber.