This Picasso Jasper necklace has mostly gray and black beads with a little warmth added from a touch of brown. The picasso jasper (15mm round beads) is just lovely with a matte surface and wonderful patterns. The black beads at the back (13mm round) are lava beads from Iceland. The necklace is hand knotted with black nylon cord and ends in a sterling silver lobster clasp. 18-1/2 inches long.