This is a single strand of green striated striped natural genuine malachite stone beads. The clasp is marked 14 1/20 K which I believe means 14K 1/20 GF. It is marked on the side of the box clasp and is a little hard to read. The necklace is 19" long and each bead is 6mm or .25" wide. The beads are individually hand knotted on the string. The gaps between the beads are not perfectly even, some slide a little on the string, so you may want to have it restrung for optimum safety. Perfect for fall/autumn or Christmas!