These very pretty beads are 5/16" in diameter. They are uniform in size and shape and polished to a uniform shine. The malachite is of excellent quality; each bead is striped with the shades of dark green and black being uniform among all the beads. There are 49 beads with knots between each bead. The clasp is a 14K gold spring ring. The necklace measures 18" long. This type of malachite is found in East Africa, but they could have been strung anywhere; these beads have recently been restrung. These beads are probably around 25-30 years old. They are in fine condition with only a few tiny scratches.