This necklace is from the 1930's art deco period as you can see by the silver-tone deco design screw clasp. The beads are big black onyx with smaller matching spacer beads. It measures 16" long. Expect this necklace to be quite heavy and cold to the touch as the beads are genuine stone. It has a few tiny scratches on some beads that are only noticeable if you examine it closely, but it's in great shape for its age.