Ancient Jet & Serpentine Necklace. Very Old Excavated Beads

Love this necklace. It so obviously has a wealth of stories tell. It is strung of ancient beads as old as 2000 years. The excavated beads are made of jet and other black stones like and it has a large ancient serpentine pendant. The dark green round beads are also serpentine of another kind but much more recent.

17.5” long. With a sterling silver hook clasp.