Gemstone Bead Graduated Necklace Hand Knotted

Previously owned hand knotted bead necklace. It is string with graduated gemstone beads in a beautiful color palette. They are jaspers, jades and perhaps chrysoprase. Beads measure 10.3mm in diameter to 19.3 mm. It has a 925 sterling silver lobster claw clasp. It is 19" long and weighs 4.7 ounces. Beautiful! Each bead is a different treaasure.